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Finding the Fourth Proportional to 621.55, 932.32 and 251.53

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Solution

The fourth proportional to 621.55, 932.32 and 251.53 is: 377.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.55 : 932.32 = 251.53 : x
  2. Step 2: Convert to fraction form
    621.55/932.32 = 251.53/x
  3. Step 3: Cross multiply
    621.55x = 932.32 × 251.53
  4. Step 4: Simplify right side
    621.55x = 234,500.53
  5. Step 5: Solve for x
    x = 234,500.53/621.55
  6. Step 6: Final answer
    x = 377.28

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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.