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Finding the Fourth Proportional to 717,697,805, 990,423,369.48 and 387,672,947.24

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Solution

The fourth proportional to 717,697,805, 990,423,369.48 and 387,672,947.24 is: 534,988,882.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,697,805 : 990,423,369.48 = 387,672,947.24 : x
  2. Step 2: Convert to fraction form
    717,697,805/990,423,369.48 = 387,672,947.24/x
  3. Step 3: Cross multiply
    717,697,805x = 990,423,369.48 × 387,672,947.24
  4. Step 4: Simplify right side
    717,697,805x = 383,960,346,661,683,072
  5. Step 5: Solve for x
    x = 383,960,346,661,683,072/717,697,805
  6. Step 6: Final answer
    x = 534,988,882.49

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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.