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Finding the Fourth Proportional to 392,173.20, 588,259.80 and 192,621.60

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Solution

The fourth proportional to 392,173.20, 588,259.80 and 192,621.60 is: 288,932.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,173.20 : 588,259.80 = 192,621.60 : x
  2. Step 2: Convert to fraction form
    392,173.20/588,259.80 = 192,621.60/x
  3. Step 3: Cross multiply
    392,173.20x = 588,259.80 × 192,621.60
  4. Step 4: Simplify right side
    392,173.20x = 113,311,543,891.68
  5. Step 5: Solve for x
    x = 113,311,543,891.68/392,173.20
  6. Step 6: Final answer
    x = 288,932.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.