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Finding the Fourth Proportional to 621.32, 932.18 and 256.28

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Solution

The fourth proportional to 621.32, 932.18 and 256.28 is: 384.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.32 : 932.18 = 256.28 : x
  2. Step 2: Convert to fraction form
    621.32/932.18 = 256.28/x
  3. Step 3: Cross multiply
    621.32x = 932.18 × 256.28
  4. Step 4: Simplify right side
    621.32x = 238,899.09
  5. Step 5: Solve for x
    x = 238,899.09/621.32
  6. Step 6: Final answer
    x = 384.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 622.32, 933.68 and 257.28
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.