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Finding the Fourth Proportional to 835,684.97, 1,253,954.96 and 398,000.20

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Solution

The fourth proportional to 835,684.97, 1,253,954.96 and 398,000.20 is: 597,203.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    835,684.97 : 1,253,954.96 = 398,000.20 : x
  2. Step 2: Convert to fraction form
    835,684.97/1,253,954.96 = 398,000.20/x
  3. Step 3: Cross multiply
    835,684.97x = 1,253,954.96 × 398,000.20
  4. Step 4: Simplify right side
    835,684.97x = 499,074,324,870.99
  5. Step 5: Solve for x
    x = 499,074,324,870.99/835,684.97
  6. Step 6: Final answer
    x = 597,203.90

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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.