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Finding the Fourth Proportional to 361,979.20, 543,163.20 and 151,638.40

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Solution

The fourth proportional to 361,979.20, 543,163.20 and 151,638.40 is: 227,539.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,979.20 : 543,163.20 = 151,638.40 : x
  2. Step 2: Convert to fraction form
    361,979.20/543,163.20 = 151,638.40/x
  3. Step 3: Cross multiply
    361,979.20x = 543,163.20 × 151,638.40
  4. Step 4: Simplify right side
    361,979.20x = 82,364,398,586.88
  5. Step 5: Solve for x
    x = 82,364,398,586.88/361,979.20
  6. Step 6: Final answer
    x = 227,539.04

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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.