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Finding the Fourth Proportional to 392,591.60, 541,638.43 and 256,705.09

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Solution

The fourth proportional to 392,591.60, 541,638.43 and 256,705.09 is: 354,162.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,591.60 : 541,638.43 = 256,705.09 : x
  2. Step 2: Convert to fraction form
    392,591.60/541,638.43 = 256,705.09/x
  3. Step 3: Cross multiply
    392,591.60x = 541,638.43 × 256,705.09
  4. Step 4: Simplify right side
    392,591.60x = 139,041,341,368.72
  5. Step 5: Solve for x
    x = 139,041,341,368.72/392,591.60
  6. Step 6: Final answer
    x = 354,162.80

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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.