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Finding the Fourth Proportional to 515,996,885.90, 724,436,373.70 and 515,996,885.90

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Solution

The fourth proportional to 515,996,885.90, 724,436,373.70 and 515,996,885.90 is: 724,436,373.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,996,885.90 : 724,436,373.70 = 515,996,885.90 : x
  2. Step 2: Convert to fraction form
    515,996,885.90/724,436,373.70 = 515,996,885.90/x
  3. Step 3: Cross multiply
    515,996,885.90x = 724,436,373.70 × 515,996,885.90
  4. Step 4: Simplify right side
    515,996,885.90x = 373,806,912,861,888,640
  5. Step 5: Solve for x
    x = 373,806,912,861,888,640/515,996,885.90
  6. Step 6: Final answer
    x = 724,436,373.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.