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Finding the Fourth Proportional to 717,697,590.50, 990,423,073.42 and 387,672,732.74

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Solution

The fourth proportional to 717,697,590.50, 990,423,073.42 and 387,672,732.74 is: 534,988,586.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,697,590.50 : 990,423,073.42 = 387,672,732.74 : x
  2. Step 2: Convert to fraction form
    717,697,590.50/990,423,073.42 = 387,672,732.74/x
  3. Step 3: Cross multiply
    717,697,590.50x = 990,423,073.42 × 387,672,732.74
  4. Step 4: Simplify right side
    717,697,590.50x = 383,960,019,441,481,024
  5. Step 5: Solve for x
    x = 383,960,019,441,481,024/717,697,590.50
  6. Step 6: Final answer
    x = 534,988,586.45

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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.