pro·por·tion·al /prəˈporʃnə1, ˈpɔr, ʃənḷ/
 (a.)比例的,相稱的,調和的比例項


 proportional
 比例範圍


 proportional
 比例


 Pro·por·tion·al a.
 1. Having a due proportion, or comparative relation; being in suitable proportion or degree; as, the parts of an edifice are proportional.
 2. Relating to, or securing, proportion.
 3. Math. Constituting a proportion; having the same, or a constant, ratio; as, proportional quantities; momentum is proportional to quantity of matter.
 Proportional logarithms, logistic logarithms. See under Logistic.
 Proportional scale, a scale on which are marked parts proportional to the logarithms of the natural numbers; a logarithmic scale.
 Proportional scales, compasses, dividers, etc. Draughting, instruments used in making copies of drawings, or drawings of objects, on an enlarged or reduced scale.


 Pro·por·tion·al, n.
 1. Math. Any number or quantity in a proportion; as, a mean proportional.
 2. Chem. The combining weight or equivalent of an element. [Obs.]

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 proportional
      adj 1: properly related in size or degree or other measurable
             characteristics; usually followed by `to'; "punishment
             oughtt to be proportional to the crime"; "earnings
             relative to production" [syn: relative]
      2: increasing as the amount taxed increases [syn: graduated]
      n : one of the quantities in a mathematical proportion