Question

The mean proportion of 1.21and0.09is

Answer 1

let x be the mean proportional of 1.21 and 0.09

x /a = b/x

here , a = 1.21 , b = 0.09

x /1.21 = 0.09/x

x × x = 1.21 ×0.09

x^2= 0.1089

x =√0.1089

x = 0.33

therefore, mean proportional = 0.33
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Your Answer: 0.33
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Answer 2

Given:

1.21 and 0.09

Let the mean proportion of 1.21 and 0.09 = x

We have to find, the mean proportion of 1.21 and 0.09 is:

Solution:

1.21, x, 0.09

∴  $\dfrac{x}{1.21}$ = $\dfrac{0.99}{x}$

⇒ x × x = 1.21 × 0.09

⇒ $x^{2}$ = 1.1 × 1.1 × 0.3 × 0.3

⇒ $x^{2}$ = $(1.1 \times 0.3)^2$

⇒ $x^{2}$ = $(0.33)^2$

⇒ x = 0.33

∴ The mean proportion of 1.21 and 0.09 = 0.33

Thus, the mean proportion of 1.21 and 0.09 = 0.33