Question

Find the mean proportional between 144 and 255.
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Answer 1

Answer:

Let the mean between 144 and 225 is x

144:x = x:225

⇒ x² = 32400

⇒ x = 180

180 is the mean proportion between 144 and 225

4.3

Answer 2

Let the mean between 144 and 225 is x

144:x = x:225

⇒ x² = 32400

⇒ x = 180

180 is the mean proportion between 144 and 225