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Finding the Fourth Proportional to 399,233.28, 550,944 and 220,385.28

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Solution

The fourth proportional to 399,233.28, 550,944 and 220,385.28 is: 304,132.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,233.28 : 550,944 = 220,385.28 : x
  2. Step 2: Convert to fraction form
    399,233.28/550,944 = 220,385.28/x
  3. Step 3: Cross multiply
    399,233.28x = 550,944 × 220,385.28
  4. Step 4: Simplify right side
    399,233.28x = 121,419,947,704.32
  5. Step 5: Solve for x
    x = 121,419,947,704.32/399,233.28
  6. Step 6: Final answer
    x = 304,132.83

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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.