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Finding the Fourth Proportional to 663,909.52, 916,190.82 and 377,429.68

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Solution

The fourth proportional to 663,909.52, 916,190.82 and 377,429.68 is: 520,850.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,909.52 : 916,190.82 = 377,429.68 : x
  2. Step 2: Convert to fraction form
    663,909.52/916,190.82 = 377,429.68/x
  3. Step 3: Cross multiply
    663,909.52x = 916,190.82 × 377,429.68
  4. Step 4: Simplify right side
    663,909.52x = 345,797,608,011.54
  5. Step 5: Solve for x
    x = 345,797,608,011.54/663,909.52
  6. Step 6: Final answer
    x = 520,850.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.