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Finding the Fourth Proportional to 392,591.97, 541,638.95 and 256,705.46

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Solution

The fourth proportional to 392,591.97, 541,638.95 and 256,705.46 is: 354,163.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,591.97 : 541,638.95 = 256,705.46 : x
  2. Step 2: Convert to fraction form
    392,591.97/541,638.95 = 256,705.46/x
  3. Step 3: Cross multiply
    392,591.97x = 541,638.95 × 256,705.46
  4. Step 4: Simplify right side
    392,591.97x = 139,041,676,846.88
  5. Step 5: Solve for x
    x = 139,041,676,846.88/392,591.97
  6. Step 6: Final answer
    x = 354,163.32

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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.