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Finding the Fourth Proportional to 249.43, 344.21 and 151.11

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Solution

The fourth proportional to 249.43, 344.21 and 151.11 is: 208.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.43 : 344.21 = 151.11 : x
  2. Step 2: Convert to fraction form
    249.43/344.21 = 151.11/x
  3. Step 3: Cross multiply
    249.43x = 344.21 × 151.11
  4. Step 4: Simplify right side
    249.43x = 52,012.82
  5. Step 5: Solve for x
    x = 52,012.82/249.43
  6. Step 6: Final answer
    x = 208.53

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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.