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Finding the Fourth Proportional to 665,688.60, 998,532.90 and 396,250.20

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Solution

The fourth proportional to 665,688.60, 998,532.90 and 396,250.20 is: 594,375.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,688.60 : 998,532.90 = 396,250.20 : x
  2. Step 2: Convert to fraction form
    665,688.60/998,532.90 = 396,250.20/x
  3. Step 3: Cross multiply
    665,688.60x = 998,532.90 × 396,250.20
  4. Step 4: Simplify right side
    665,688.60x = 395,668,861,331.58
  5. Step 5: Solve for x
    x = 395,668,861,331.58/665,688.60
  6. Step 6: Final answer
    x = 594,375.30

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Similar ratio
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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.