rule of three
the method of finding the fourth term in a proportion when three terms are given.
Origin of rule of three
1Words Nearby rule of three
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How to use rule of three in a sentence
Boys were never taught the rule-of-three until after they had learnt addition.
Essays on Education and Kindred Subjects | Herbert SpencerIt is as if we were to talk of the color of sound, or the longitude of the Rule-of-three.
Prose Masterpieces from Modern Essayists | James Anthony Froude, Edward A. Freeman, William Ewart Gladstone, John Henry Newman and Leslie StephenA man who's seen Injin fightin' don't go much on this here West Point fightin' by rule-of-three—but that ain't here or there!
Clarence | Bret HarteHe got into the rule-of-three without having learned numeration, addition, subtraction, and division.
Homes and haunts of the most eminent British poets, Vol. II (of 2) | William HowittWhen it was found that he could not do decimals, he was put back to the rule-of-three, and then pronounced incurable.
Homes and haunts of the most eminent British poets, Vol. II (of 2) | William Howitt
British Dictionary definitions for rule of three
a mathematical rule asserting that the value of one unknown quantity in a proportion is found by multiplying the denominator of each ratio by the numerator of the other
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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