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mean proportional

American  

noun

Mathematics.

  1. (between two numbers a andb ) a number x for which a/x = x/b .

    The number 3 is a mean proportional between 1 and 9.

Etymology

Origin of mean proportional

First recorded in 1565–75

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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