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Finding the Fourth Proportional to 812,449.92, 1,121,167.22 and 449,866

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Solution

The fourth proportional to 812,449.92, 1,121,167.22 and 449,866 is: 620,807.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,449.92 : 1,121,167.22 = 449,866 : x
  2. Step 2: Convert to fraction form
    812,449.92/1,121,167.22 = 449,866/x
  3. Step 3: Cross multiply
    812,449.92x = 1,121,167.22 × 449,866
  4. Step 4: Simplify right side
    812,449.92x = 504,375,012,592.52
  5. Step 5: Solve for x
    x = 504,375,012,592.52/812,449.92
  6. Step 6: Final answer
    x = 620,807.51

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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.