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Finding the Fourth Proportional to 408,382.56, 612,573.48 and 127,921.68

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Solution

The fourth proportional to 408,382.56, 612,573.48 and 127,921.68 is: 191,882.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,382.56 : 612,573.48 = 127,921.68 : x
  2. Step 2: Convert to fraction form
    408,382.56/612,573.48 = 127,921.68/x
  3. Step 3: Cross multiply
    408,382.56x = 612,573.48 × 127,921.68
  4. Step 4: Simplify right side
    408,382.56x = 78,361,428,685.05
  5. Step 5: Solve for x
    x = 78,361,428,685.05/408,382.56
  6. Step 6: Final answer
    x = 191,882.41

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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.