Home / 664,489.20-996,733.80-398,112.60

Finding the Fourth Proportional to 664,489.20, 996,733.80 and 398,112.60

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Solution

The fourth proportional to 664,489.20, 996,733.80 and 398,112.60 is: 597,168.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,489.20 : 996,733.80 = 398,112.60 : x
  2. Step 2: Convert to fraction form
    664,489.20/996,733.80 = 398,112.60/x
  3. Step 3: Cross multiply
    664,489.20x = 996,733.80 × 398,112.60
  4. Step 4: Simplify right side
    664,489.20x = 396,812,284,625.88
  5. Step 5: Solve for x
    x = 396,812,284,625.88/664,489.20
  6. Step 6: Final answer
    x = 597,168.90

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Double scale
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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.