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Finding the Fourth Proportional to 638.73, 956.79 and 474.39

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Solution

The fourth proportional to 638.73, 956.79 and 474.39 is: 710.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.73 : 956.79 = 474.39 : x
  2. Step 2: Convert to fraction form
    638.73/956.79 = 474.39/x
  3. Step 3: Cross multiply
    638.73x = 956.79 × 474.39
  4. Step 4: Simplify right side
    638.73x = 453,891.61
  5. Step 5: Solve for x
    x = 453,891.61/638.73
  6. Step 6: Final answer
    x = 710.62

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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.