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Finding the Fourth Proportional to 443,398.86, 665,098.56 and 143,879.76

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Solution

The fourth proportional to 443,398.86, 665,098.56 and 143,879.76 is: 215,819.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,398.86 : 665,098.56 = 143,879.76 : x
  2. Step 2: Convert to fraction form
    443,398.86/665,098.56 = 143,879.76/x
  3. Step 3: Cross multiply
    443,398.86x = 665,098.56 × 143,879.76
  4. Step 4: Simplify right side
    443,398.86x = 95,694,221,189.15
  5. Step 5: Solve for x
    x = 95,694,221,189.15/443,398.86
  6. Step 6: Final answer
    x = 215,819.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.