Home / 521,447,596.38-720,234,294.21-389,872,105.20

Finding the Fourth Proportional to 521,447,596.38, 720,234,294.21 and 389,872,105.20

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Solution

The fourth proportional to 521,447,596.38, 720,234,294.21 and 389,872,105.20 is: 538,499,481.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,447,596.38 : 720,234,294.21 = 389,872,105.20 : x
  2. Step 2: Convert to fraction form
    521,447,596.38/720,234,294.21 = 389,872,105.20/x
  3. Step 3: Cross multiply
    521,447,596.38x = 720,234,294.21 × 389,872,105.20
  4. Step 4: Simplify right side
    521,447,596.38x = 280,799,260,520,888,864
  5. Step 5: Solve for x
    x = 280,799,260,520,888,864/521,447,596.38
  6. Step 6: Final answer
    x = 538,499,481.96

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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.