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Finding the Fourth Proportional to 717,697,703.25, 990,423,229.01 and 387,672,845.49

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Solution

The fourth proportional to 717,697,703.25, 990,423,229.01 and 387,672,845.49 is: 534,988,742.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,697,703.25 : 990,423,229.01 = 387,672,845.49 : x
  2. Step 2: Convert to fraction form
    717,697,703.25/990,423,229.01 = 387,672,845.49/x
  3. Step 3: Cross multiply
    717,697,703.25x = 990,423,229.01 × 387,672,845.49
  4. Step 4: Simplify right side
    717,697,703.25x = 383,960,191,427,762,240
  5. Step 5: Solve for x
    x = 383,960,191,427,762,240/717,697,703.25
  6. Step 6: Final answer
    x = 534,988,742.04

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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.