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Finding the Fourth Proportional to 399,659.20, 599,488.80 and 222,081.28

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Solution

The fourth proportional to 399,659.20, 599,488.80 and 222,081.28 is: 333,121.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,659.20 : 599,488.80 = 222,081.28 : x
  2. Step 2: Convert to fraction form
    399,659.20/599,488.80 = 222,081.28/x
  3. Step 3: Cross multiply
    399,659.20x = 599,488.80 × 222,081.28
  4. Step 4: Simplify right side
    399,659.20x = 133,135,240,049.66
  5. Step 5: Solve for x
    x = 133,135,240,049.66/399,659.20
  6. Step 6: Final answer
    x = 333,121.92

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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.