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Finding the Fourth Proportional to 249.16, 343.96 and 155.97

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Solution

The fourth proportional to 249.16, 343.96 and 155.97 is: 215.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.16 : 343.96 = 155.97 : x
  2. Step 2: Convert to fraction form
    249.16/343.96 = 155.97/x
  3. Step 3: Cross multiply
    249.16x = 343.96 × 155.97
  4. Step 4: Simplify right side
    249.16x = 53,644.94
  5. Step 5: Solve for x
    x = 53,644.94/249.16
  6. Step 6: Final answer
    x = 215.30

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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.