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Finding the Fourth Proportional to 641.10, 956.80 and 624.70

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Solution

The fourth proportional to 641.10, 956.80 and 624.70 is: 932.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.10 : 956.80 = 624.70 : x
  2. Step 2: Convert to fraction form
    641.10/956.80 = 624.70/x
  3. Step 3: Cross multiply
    641.10x = 956.80 × 624.70
  4. Step 4: Simplify right side
    641.10x = 597,712.96
  5. Step 5: Solve for x
    x = 597,712.96/641.10
  6. Step 6: Final answer
    x = 932.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.