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Finding the Fourth Proportional to 664,008,818.20, 996,013,227.30 and 654,938,891.80

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Solution

The fourth proportional to 664,008,818.20, 996,013,227.30 and 654,938,891.80 is: 982,408,337.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,008,818.20 : 996,013,227.30 = 654,938,891.80 : x
  2. Step 2: Convert to fraction form
    664,008,818.20/996,013,227.30 = 654,938,891.80/x
  3. Step 3: Cross multiply
    664,008,818.20x = 996,013,227.30 × 654,938,891.80
  4. Step 4: Simplify right side
    664,008,818.20x = 652,327,799,306,003,456
  5. Step 5: Solve for x
    x = 652,327,799,306,003,456/664,008,818.20
  6. Step 6: Final answer
    x = 982,408,337.70

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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.