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Finding the Fourth Proportional to 392,312.43, 541,251.90 and 256,424.85

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Solution

The fourth proportional to 392,312.43, 541,251.90 and 256,424.85 is: 353,775.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,312.43 : 541,251.90 = 256,424.85 : x
  2. Step 2: Convert to fraction form
    392,312.43/541,251.90 = 256,424.85/x
  3. Step 3: Cross multiply
    392,312.43x = 541,251.90 × 256,424.85
  4. Step 4: Simplify right side
    392,312.43x = 138,790,437,269.72
  5. Step 5: Solve for x
    x = 138,790,437,269.72/392,312.43
  6. Step 6: Final answer
    x = 353,775.27

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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.