□ : 24 : : 3 : 8

`square` : 24 : : 3 : 8

रिकाम्या जागा भरा

9 : 24 : : 3 : 8

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पाठ 3: Ratio and Proportion - Exercise 3.3 [पृष्ठ ५८]

पाठ 3 Ratio and Proportion
Exercise 3.3 | Q 1. (ii) | पृष्ठ ५८

If a, b, c are in continued proportion and a(b - c) = 2b, prove that `a - c = (2(a + b))/a`

Find the mean proportional to (x – y) and (x³ – x²y).

Find the value of the unknown in the following proportion :

`1/2 : "m" :: 14/9 : 4/3`

Find the mean proportion of the following :

ab³ and a³b

Find two numbers whose mean proportional is 18 and the third proportional is 486.

If a, b, c and dare in continued proportion, then prove that

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

Find the third proportional to 0.24, 0.6

If a + c = mb and `1/b + 1/d = m/c`, prove that a, b, c and d are in proportion.

What number must be added to each of the numbers 15, 17, 34 and 38 to make them proportional?

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

21 : 6 : : 35 : 10