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Finding the Fourth Proportional to 399,286.68, 551,001.15 and 217,995.27

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Solution

The fourth proportional to 399,286.68, 551,001.15 and 217,995.27 is: 300,825.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,286.68 : 551,001.15 = 217,995.27 : x
  2. Step 2: Convert to fraction form
    399,286.68/551,001.15 = 217,995.27/x
  3. Step 3: Cross multiply
    399,286.68x = 551,001.15 × 217,995.27
  4. Step 4: Simplify right side
    399,286.68x = 120,115,644,464.56
  5. Step 5: Solve for x
    x = 120,115,644,464.56/399,286.68
  6. Step 6: Final answer
    x = 300,825.57

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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.