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Finding the Fourth Proportional to 249.49, 344.01 and 218.31

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Solution

The fourth proportional to 249.49, 344.01 and 218.31 is: 301.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.49 : 344.01 = 218.31 : x
  2. Step 2: Convert to fraction form
    249.49/344.01 = 218.31/x
  3. Step 3: Cross multiply
    249.49x = 344.01 × 218.31
  4. Step 4: Simplify right side
    249.49x = 75,100.82
  5. Step 5: Solve for x
    x = 75,100.82/249.49
  6. Step 6: Final answer
    x = 301.02

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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.