find the mean proportional between 27 and 243
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let the two numbers are a, b . mean proportional between two numbers is defined as ,
x / a = b / x
let a = 27 , b = 243
x / 27 = 243 / x
x × x = 27 × 243
x^2 = 6561 => x = √6561
x = 81
therefore , mean proportional between 27 and 243 is 81.
Answer : 81
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x / a = b / x
let a = 27 , b = 243
x / 27 = 243 / x
x × x = 27 × 243
x^2 = 6561 => x = √6561
x = 81
therefore , mean proportional between 27 and 243 is 81.
Answer : 81
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