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Finding the Fourth Proportional to 664,279.80, 996,419.70 and 658,374.90

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Solution

The fourth proportional to 664,279.80, 996,419.70 and 658,374.90 is: 987,562.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,279.80 : 996,419.70 = 658,374.90 : x
  2. Step 2: Convert to fraction form
    664,279.80/996,419.70 = 658,374.90/x
  3. Step 3: Cross multiply
    664,279.80x = 996,419.70 × 658,374.90
  4. Step 4: Simplify right side
    664,279.80x = 656,017,720,345.53
  5. Step 5: Solve for x
    x = 656,017,720,345.53/664,279.80
  6. Step 6: Final answer
    x = 987,562.35

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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.