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Finding the Fourth Proportional to 394,396.25, 591,299.13 and 127,997.78

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Solution

The fourth proportional to 394,396.25, 591,299.13 and 127,997.78 is: 191,900.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,396.25 : 591,299.13 = 127,997.78 : x
  2. Step 2: Convert to fraction form
    394,396.25/591,299.13 = 127,997.78/x
  3. Step 3: Cross multiply
    394,396.25x = 591,299.13 × 127,997.78
  4. Step 4: Simplify right side
    394,396.25x = 75,684,975,955.93
  5. Step 5: Solve for x
    x = 75,684,975,955.93/394,396.25
  6. Step 6: Final answer
    x = 191,900.85

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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.