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Finding the Fourth Proportional to 399,591.38, 551,436.10 and 220,743.38

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Solution

The fourth proportional to 399,591.38, 551,436.10 and 220,743.38 is: 304,625.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,591.38 : 551,436.10 = 220,743.38 : x
  2. Step 2: Convert to fraction form
    399,591.38/551,436.10 = 220,743.38/x
  3. Step 3: Cross multiply
    399,591.38x = 551,436.10 × 220,743.38
  4. Step 4: Simplify right side
    399,591.38x = 121,725,868,568.02
  5. Step 5: Solve for x
    x = 121,725,868,568.02/399,591.38
  6. Step 6: Final answer
    x = 304,625.86

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1.5x scale

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.