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Finding the Fourth Proportional to 622.38, 932.78 and 256.73

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Solution

The fourth proportional to 622.38, 932.78 and 256.73 is: 384.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.38 : 932.78 = 256.73 : x
  2. Step 2: Convert to fraction form
    622.38/932.78 = 256.73/x
  3. Step 3: Cross multiply
    622.38x = 932.78 × 256.73
  4. Step 4: Simplify right side
    622.38x = 239,472.61
  5. Step 5: Solve for x
    x = 239,472.61/622.38
  6. Step 6: Final answer
    x = 384.77

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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.