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Finding the Fourth Proportional to 485,321.70, 727,982.55 and 443,331.30

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Solution

The fourth proportional to 485,321.70, 727,982.55 and 443,331.30 is: 664,996.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,321.70 : 727,982.55 = 443,331.30 : x
  2. Step 2: Convert to fraction form
    485,321.70/727,982.55 = 443,331.30/x
  3. Step 3: Cross multiply
    485,321.70x = 727,982.55 × 443,331.30
  4. Step 4: Simplify right side
    485,321.70x = 322,737,450,268.82
  5. Step 5: Solve for x
    x = 322,737,450,268.82/485,321.70
  6. Step 6: Final answer
    x = 664,996.95

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Similar ratio
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1.5x scale

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.