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mean proportional
noun
, Mathematics.
- (between two numbers a and b ) a number x for which a/x = x/b :
The number 3 is a mean proportional between 1 and 9.
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Word History and Origins
Origin of mean proportional1
First recorded in 1565–75
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Example Sentences
We then find the mean proportional between the length HD and the height of the parallelogram.
From Project Gutenberg
Then x - 5 is a mean proportional between x - 9 and x, from which we find that x equals 25.
From Project Gutenberg
Lastly, as there is only one mean proportional between each relation, there is also only one good government possible for a State.
From Project Gutenberg
In the Pyramid Cheops, altitude is very nearly a mean proportional between apothem and half base.
From Project Gutenberg
To find a mean proportional between two given straight lines.
From Project Gutenberg
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