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Finding the Fourth Proportional to 708,799,793.56, 978,143,751.84 and 391,260,123.52

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Solution

The fourth proportional to 708,799,793.56, 978,143,751.84 and 391,260,123.52 is: 539,938,990.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,799,793.56 : 978,143,751.84 = 391,260,123.52 : x
  2. Step 2: Convert to fraction form
    708,799,793.56/978,143,751.84 = 391,260,123.52/x
  3. Step 3: Cross multiply
    708,799,793.56x = 978,143,751.84 × 391,260,123.52
  4. Step 4: Simplify right side
    708,799,793.56x = 382,708,645,165,234,624
  5. Step 5: Solve for x
    x = 382,708,645,165,234,624/708,799,793.56
  6. Step 6: Final answer
    x = 539,938,990.73

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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.