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Finding the Fourth Proportional to 485,581.40, 728,333.20 and 165,705.92

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Solution

The fourth proportional to 485,581.40, 728,333.20 and 165,705.92 is: 248,545.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,581.40 : 728,333.20 = 165,705.92 : x
  2. Step 2: Convert to fraction form
    485,581.40/728,333.20 = 165,705.92/x
  3. Step 3: Cross multiply
    485,581.40x = 728,333.20 × 165,705.92
  4. Step 4: Simplify right side
    485,581.40x = 120,689,122,972.54
  5. Step 5: Solve for x
    x = 120,689,122,972.54/485,581.40
  6. Step 6: Final answer
    x = 248,545.61

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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.