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Finding the Fourth Proportional to 485,040.20, 727,560.30 and 408,057.80

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Solution

The fourth proportional to 485,040.20, 727,560.30 and 408,057.80 is: 612,086.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,040.20 : 727,560.30 = 408,057.80 : x
  2. Step 2: Convert to fraction form
    485,040.20/727,560.30 = 408,057.80/x
  3. Step 3: Cross multiply
    485,040.20x = 727,560.30 × 408,057.80
  4. Step 4: Simplify right side
    485,040.20x = 296,886,655,385.34
  5. Step 5: Solve for x
    x = 296,886,655,385.34/485,040.20
  6. Step 6: Final answer
    x = 612,086.70

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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.