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Finding the Fourth Proportional to 392,313.43, 541,253.28 and 256,425.85

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Solution

The fourth proportional to 392,313.43, 541,253.28 and 256,425.85 is: 353,776.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,313.43 : 541,253.28 = 256,425.85 : x
  2. Step 2: Convert to fraction form
    392,313.43/541,253.28 = 256,425.85/x
  3. Step 3: Cross multiply
    392,313.43x = 541,253.28 × 256,425.85
  4. Step 4: Simplify right side
    392,313.43x = 138,791,332,389.29
  5. Step 5: Solve for x
    x = 138,791,332,389.29/392,313.43
  6. Step 6: Final answer
    x = 353,776.65

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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.