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Finding the Fourth Proportional to 392,689.38, 541,755.42 and 227,086.76

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Solution

The fourth proportional to 392,689.38, 541,755.42 and 227,086.76 is: 313,289.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,689.38 : 541,755.42 = 227,086.76 : x
  2. Step 2: Convert to fraction form
    392,689.38/541,755.42 = 227,086.76/x
  3. Step 3: Cross multiply
    392,689.38x = 541,755.42 × 227,086.76
  4. Step 4: Simplify right side
    392,689.38x = 123,025,483,040.24
  5. Step 5: Solve for x
    x = 123,025,483,040.24/392,689.38
  6. Step 6: Final answer
    x = 313,289.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.