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Finding the Fourth Proportional to 249.17, 343.83 and 142.83

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Solution

The fourth proportional to 249.17, 343.83 and 142.83 is: 197.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.17 : 343.83 = 142.83 : x
  2. Step 2: Convert to fraction form
    249.17/343.83 = 142.83/x
  3. Step 3: Cross multiply
    249.17x = 343.83 × 142.83
  4. Step 4: Simplify right side
    249.17x = 49,108.85
  5. Step 5: Solve for x
    x = 49,108.85/249.17
  6. Step 6: Final answer
    x = 197.09

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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.