Question

Find the mean proportional between :
17.5 and 0.007

Answer 1

Let the mean proportional between 17.5 and 0.007 be x.
⟹ 17.5, x and 0.007 are in continued proportion.
⟹ 17.5 : x = x : 0.007
⟹ x × x = 17.5 × 0.007
⟹ x² = 0.1225
⟹ x = 0.35