Source : Webster's Revised Unabridged Dictionary (1913)

Proportionate \Pro*por"tion*ate\, a. [L. proportionatus. See
   {Proportion}.]
   Adjusted to something else according to a proportion;
   proportional. --Longfellow.

         What is proportionate to his transgression. --Locke.

Proportionate \Pro*por"tion*ate\, v. t. [imp. & p. p.
   {Proportionated}; p. pr. & vb. n. {Proportionating}.] [Cf.
   {Proportion}, v.]
   To make proportional; to adjust according to a settled rate,
   or to due comparative relation; to proportion; as, to
   proportionate punishment to crimes.

Source : WordNet®

proportionate
     adj 1: being in due proportion [ant: {disproportionate}]
     2: agreeing in amount, magnitude, or degree; "the figures are
        large but the corresponding totals next year will be
        larger" [syn: {corresponding}, {in proportion to}]
     3: exhibiting equivalence or correspondence among constituents
        of an entity or between different entities [syn: {harmonious},
         {symmetrical}]