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Finding the Fourth Proportional to 399,591.88, 551,436.79 and 220,743.88

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Solution

The fourth proportional to 399,591.88, 551,436.79 and 220,743.88 is: 304,626.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,591.88 : 551,436.79 = 220,743.88 : x
  2. Step 2: Convert to fraction form
    399,591.88/551,436.79 = 220,743.88/x
  3. Step 3: Cross multiply
    399,591.88x = 551,436.79 × 220,743.88
  4. Step 4: Simplify right side
    399,591.88x = 121,726,296,599.35
  5. Step 5: Solve for x
    x = 121,726,296,599.35/399,591.88
  6. Step 6: Final answer
    x = 304,626.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.