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Finding the Fourth Proportional to 418,990.73, 628,491.92 and 119,471.42

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Solution

The fourth proportional to 418,990.73, 628,491.92 and 119,471.42 is: 179,208.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,990.73 : 628,491.92 = 119,471.42 : x
  2. Step 2: Convert to fraction form
    418,990.73/628,491.92 = 119,471.42/x
  3. Step 3: Cross multiply
    418,990.73x = 628,491.92 × 119,471.42
  4. Step 4: Simplify right side
    418,990.73x = 75,086,818,401.11
  5. Step 5: Solve for x
    x = 75,086,818,401.11/418,990.73
  6. Step 6: Final answer
    x = 179,208.78

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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.