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Finding the Fourth Proportional to 621.43, 932.15 and 255.96

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Solution

The fourth proportional to 621.43, 932.15 and 255.96 is: 383.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.43 : 932.15 = 255.96 : x
  2. Step 2: Convert to fraction form
    621.43/932.15 = 255.96/x
  3. Step 3: Cross multiply
    621.43x = 932.15 × 255.96
  4. Step 4: Simplify right side
    621.43x = 238,593.75
  5. Step 5: Solve for x
    x = 238,593.75/621.43
  6. Step 6: Final answer
    x = 383.94

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Similar ratio
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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.