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Finding the Fourth Proportional to 391,068,118.80, 586,602,178.20 and 385,021,501.20

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Solution

The fourth proportional to 391,068,118.80, 586,602,178.20 and 385,021,501.20 is: 577,532,251.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,068,118.80 : 586,602,178.20 = 385,021,501.20 : x
  2. Step 2: Convert to fraction form
    391,068,118.80/586,602,178.20 = 385,021,501.20/x
  3. Step 3: Cross multiply
    391,068,118.80x = 586,602,178.20 × 385,021,501.20
  4. Step 4: Simplify right side
    391,068,118.80x = 225,854,451,257,753,920
  5. Step 5: Solve for x
    x = 225,854,451,257,753,920/391,068,118.80
  6. Step 6: Final answer
    x = 577,532,251.80

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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.