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Finding the Fourth Proportional to 393,753.60, 543,191.04 and 257,727.68

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Solution

The fourth proportional to 393,753.60, 543,191.04 and 257,727.68 is: 355,540.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,753.60 : 543,191.04 = 257,727.68 : x
  2. Step 2: Convert to fraction form
    393,753.60/543,191.04 = 257,727.68/x
  3. Step 3: Cross multiply
    393,753.60x = 543,191.04 × 257,727.68
  4. Step 4: Simplify right side
    393,753.60x = 139,995,366,535.99
  5. Step 5: Solve for x
    x = 139,995,366,535.99/393,753.60
  6. Step 6: Final answer
    x = 355,540.54

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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.