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Finding the Fourth Proportional to 485,770.80, 727,489.80 and 392,458.80

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Solution

The fourth proportional to 485,770.80, 727,489.80 and 392,458.80 is: 587,745.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,770.80 : 727,489.80 = 392,458.80 : x
  2. Step 2: Convert to fraction form
    485,770.80/727,489.80 = 392,458.80/x
  3. Step 3: Cross multiply
    485,770.80x = 727,489.80 × 392,458.80
  4. Step 4: Simplify right side
    485,770.80x = 285,509,773,920.24
  5. Step 5: Solve for x
    x = 285,509,773,920.24/485,770.80
  6. Step 6: Final answer
    x = 587,745.85

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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.