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Finding the Fourth Proportional to 717,494,281.92, 990,142,099.20 and 387,469,411.20

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Solution

The fourth proportional to 717,494,281.92, 990,142,099.20 and 387,469,411.20 is: 534,707,782.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,494,281.92 : 990,142,099.20 = 387,469,411.20 : x
  2. Step 2: Convert to fraction form
    717,494,281.92/990,142,099.20 = 387,469,411.20/x
  3. Step 3: Cross multiply
    717,494,281.92x = 990,142,099.20 × 387,469,411.20
  4. Step 4: Simplify right side
    717,494,281.92x = 383,649,776,181,355,968
  5. Step 5: Solve for x
    x = 383,649,776,181,355,968/717,494,281.92
  6. Step 6: Final answer
    x = 534,707,782.14

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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.