Find the mean proportion of: 8.1 and 2.5

Sum

Let the x be the mean proportion of 8.1 and 2.5
∴ 8.1 : x : : x : 2.5
∴ x2 = 8.1 x 2.5
∴ x = `sqrt(8.1 xx 2.5)`
= `sqrt(20.25)`
= 4.5.

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Chapter 6: Ratio and Proportion - Exercise 7.2

Chapter 6 Ratio and Proportion
Exercise 7.2 | Q 4.3

If p + r = mq and `1/q + 1/s = m/r`; then prove that p : q = r : s.

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3,5 and 15

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0.09 and 0.25

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`sqrt(ab) - sqrt(bc) + sqrt(cd) = sqrt((a - b + c) (b - c + d)`

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If 9, x, x 49 are in proportion, find the value of x.

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5 : `square` : : 10 : 8 : : 15 : `square`

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Write True (T) or False (F) against the following statement:

0.9 : 0.36 : : 10 : 4