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Finding the Fourth Proportional to 485,854.20, 728,246.70 and 170,148.60

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Solution

The fourth proportional to 485,854.20, 728,246.70 and 170,148.60 is: 255,035.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,854.20 : 728,246.70 = 170,148.60 : x
  2. Step 2: Convert to fraction form
    485,854.20/728,246.70 = 170,148.60/x
  3. Step 3: Cross multiply
    485,854.20x = 728,246.70 × 170,148.60
  4. Step 4: Simplify right side
    485,854.20x = 123,910,156,459.62
  5. Step 5: Solve for x
    x = 123,910,156,459.62/485,854.20
  6. Step 6: Final answer
    x = 255,035.68

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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.