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Finding the Fourth Proportional to 539,753.34, 809,910.21 and 220,139.69

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Solution

The fourth proportional to 539,753.34, 809,910.21 and 220,139.69 is: 330,323.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,753.34 : 809,910.21 = 220,139.69 : x
  2. Step 2: Convert to fraction form
    539,753.34/809,910.21 = 220,139.69/x
  3. Step 3: Cross multiply
    539,753.34x = 809,910.21 × 220,139.69
  4. Step 4: Simplify right side
    539,753.34x = 178,293,381,456.54
  5. Step 5: Solve for x
    x = 178,293,381,456.54/539,753.34
  6. Step 6: Final answer
    x = 330,323.81

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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.