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Finding the Fourth Proportional to 249.13, 343.97 and 155.91

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Solution

The fourth proportional to 249.13, 343.97 and 155.91 is: 215.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.13 : 343.97 = 155.91 : x
  2. Step 2: Convert to fraction form
    249.13/343.97 = 155.91/x
  3. Step 3: Cross multiply
    249.13x = 343.97 × 155.91
  4. Step 4: Simplify right side
    249.13x = 53,628.36
  5. Step 5: Solve for x
    x = 53,628.36/249.13
  6. Step 6: Final answer
    x = 215.26

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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.