Question

find the mean proportional between 27 and 243,please provide steps.

Answer 1

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$<b><i>$Let the mean proportion between 27 and 243 be x.

•°• 27 : x :: x : 243

$\implies$27/x = x/243

$\implies$ x × x = 243 × 27

$\implies$x² = 6561

$\implies$x = √6561

$\implies$x = 81

Hence, the mean proportion between 27 and 243 is 81.

Answer 2

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