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Finding the Fourth Proportional to 403,937.80, 605,906.70 and 137,998.60

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Solution

The fourth proportional to 403,937.80, 605,906.70 and 137,998.60 is: 206,997.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,937.80 : 605,906.70 = 137,998.60 : x
  2. Step 2: Convert to fraction form
    403,937.80/605,906.70 = 137,998.60/x
  3. Step 3: Cross multiply
    403,937.80x = 605,906.70 × 137,998.60
  4. Step 4: Simplify right side
    403,937.80x = 83,614,276,330.62
  5. Step 5: Solve for x
    x = 83,614,276,330.62/403,937.80
  6. Step 6: Final answer
    x = 206,997.90

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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.