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Pro·por·tion n.

1. The relation or adaptation of one portion to another, or to the whole, as respect magnitude, quantity, or degree; comparative relation; ratio; as, the proportion of the parts of a building, or of the body.

*The image of Christ, made after his own proportion.* --*Ridley.*

*Formed in the best proportions of her sex.* --*Sir W. Scott.*

*Documents are authentic and facts are true precisely in proportion to the support which they afford to his theory.* --*Macaulay.*

2. Harmonic relation between parts, or between different things of the same kind; symmetrical arrangement or adjustment; symmetry; as, to be out of proportion. *“Let us prophesy according to the proportion of faith.”*

3. The portion one receives when a whole is distributed by a rule or principle; equal or proper share; lot.

4. A part considered comparatively; a share.

5. Math. (a) The equality or similarity of ratios, especially of geometrical ratios; or a relation among quantities such that the quotient of the first divided by the second is equal to that of the third divided by the fourth; -- called also geometrical proportion, in distinction from

Note: ☞

a:b::c:d, or a:b = c:d, or a/b = c/d.

(b) The rule of three, in arithmetic, in which the three given terms, together with the one sought, are proportional.

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