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Finding the Fourth Proportional to 408,592.88, 612,889.32 and 128,132

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Solution

The fourth proportional to 408,592.88, 612,889.32 and 128,132 is: 192,198.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,592.88 : 612,889.32 = 128,132 : x
  2. Step 2: Convert to fraction form
    408,592.88/612,889.32 = 128,132/x
  3. Step 3: Cross multiply
    408,592.88x = 612,889.32 × 128,132
  4. Step 4: Simplify right side
    408,592.88x = 78,530,734,350.24
  5. Step 5: Solve for x
    x = 78,530,734,350.24/408,592.88
  6. Step 6: Final answer
    x = 192,198.00

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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.