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Finding the Fourth Proportional to 621.14, 929.88 and 474.53

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Solution

The fourth proportional to 621.14, 929.88 and 474.53 is: 710.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.14 : 929.88 = 474.53 : x
  2. Step 2: Convert to fraction form
    621.14/929.88 = 474.53/x
  3. Step 3: Cross multiply
    621.14x = 929.88 × 474.53
  4. Step 4: Simplify right side
    621.14x = 441,251.31
  5. Step 5: Solve for x
    x = 441,251.31/621.14
  6. Step 6: Final answer
    x = 710.40

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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.