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Question

Find the mean proportional of 49 and 16.

This question was previously asked in
RRB ALP 2025 CBT 2 Wiremen Question Paper (28-Jul-2026) (Shift 2)
The correct answer is
28

Mean Proportional Calculation

The mean proportional (or geometric mean) of two numbers, say '\(a\)' and '\(b\)', is defined as the square root of their product. The formula is:

Mean Proportional = \(\sqrt{a \times b}\)

Applying the Formula

In this problem, we need to find the mean proportional of 49 and 16. So, we have:

  • \(a = 49\)
  • \(b = 16\)

Step-by-Step Solution

  1. Substitute the values of '\(a\)' and '\(b\)' into the formula:

    Mean Proportional = \(\sqrt{49 \times 16}\)

  2. Calculate the product of the two numbers:

    \(49 \times 16 = 784\)

    Mean Proportional = \(\sqrt{784}\)

  3. Find the square root of the product. Alternatively, calculate the square root of each number first:

    Mean Proportional = \(\sqrt{49} \times \sqrt{16}\)

    Mean Proportional = \(7 \times 4\)

  4. Perform the final multiplication:

    Mean Proportional = \(28\)

Therefore, the mean proportional of 49 and 16 is 28.

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Similar Questions

  1. If 25 : x :: x : 36, and x > 0, then what is the value of x?


Important Questions from Mean Proportional

  1. When x is subtracted from each of 24, 30, 36 and 46, the numbers so obtained in this order, are in proportion. What is the mean proportional between (2x + 3) and (3x + 2)?

  2. What is the mean proportional of 40 and 90?

  3. The first, third and fourth terms of a proportion are 8, 16 and 6 respectively. What is the second term?

  4. The mean proportional between 0.16 and 0.64 is:

  5. What is the mean proportional between 3 and 27?

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