a) At a constant ratio (to). Two magnitudes (numbers) are said to be proportional if the second varies in a direct relation arithmetically to the first.


b) In proportion (to), proportionate. More common in US than UK.

, The stopping distance is proportional to the square of the speed of the vehicle. — [ "How Far Will It Skid"] at

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  • proportional — pro‧por‧tio‧nal [prəˈpɔːʆnəl ǁ ɔːr ] also pro‧por‧tion‧ate [prəˈpɔːʆnt ǁ ɔːr ] adjective something that is proportional to something else is related to it in terms of size, amount, importance etc: • The fee charged by the realtor is directly… …   Financial and business terms

  • proporţional — PROPORŢIONÁL, Ă, proporţionali, e, adj. Care formează o proporţie, care corespunde unei proporţii. ♢ Impozit proporţional = impozit stabilit în raport cu venitul cuiva. (mat.) Medie proporţională = rădăcina pătrată a produsului dintre două… …   Dicționar Român

  • proportional — proportional, proportionate, commensurate, commensurable are often used without marked distinction because all mean being duly proportioned to something else. Proportional and proportionate both imply due proportions either to a related thing or… …   New Dictionary of Synonyms

  • Proportional — Pro*por tion*al, a. [L. proportionalis: cf. F. proportionnel.] 1. Having a due proportion, or comparative relation; being in suitable proportion or degree; as, the parts of an edifice are proportional. Milton. [1913 Webster] 2. Relating to, or… …   The Collaborative International Dictionary of English

  • proportional — proportional, proportionate Both words mean ‘in due proportion, comparable’, and are used almost interchangeably, except in certain fixed expressions such as proportional parts and proportional representation. Otherwise, when proportional occurs… …   Modern English usage

  • Proportional — Pro*por tion*al, n. 1. (Math.) Any number or quantity in a proportion; as, a mean proportional. [1913 Webster] 2. (Chem.) The combining weight or equivalent of an element. [Obs.] [1913 Webster] …   The Collaborative International Dictionary of English

  • proportional — Adj. (Mittelstufe) in gleichem Verhältnis zueinander stehend Beispiel: Die Nachfrage wächst proportional zum Bevölkerungswachstum. Kollokation: proportionaler Anteil am Vermögen …   Extremes Deutsch

  • proportional — [prə pôr′shə nəl, prōpôr′shə nəl] adj. [ME proporcional < L proportionalis] 1. of or determined by proportion; relative 2. having, or being in, proportion [pay proportional to work done] 3. Math. having the same or a constant ratio n. a… …   English World dictionary

  • Proportional — sind Größen, welche eine Proportion (s.d.) bilden, dahin gehören Waaren mit ihren Preisen, Capitale mit den Zinsen, Kräfte mit ihren Geschwindigkeiten, Parallelogramme von[630] gleicher Höhe mit ihren Grundlinien, od. von gleichen Grundlinien mit …   Pierer's Universal-Lexikon

  • proportional — index commensurable, commensurate, congruous, harmonious, proportionate, relative (comparative) Burton s Legal Thesaurus …   Law dictionary

  • proportional — 1560s, from L. proportionalis, from proportionem (see PROPORTION (Cf. proportion)). Related: Proportionally …   Etymology dictionary

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