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Finding the Fourth Proportional to 249.72, 344.61 and 151.53

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Solution

The fourth proportional to 249.72, 344.61 and 151.53 is: 209.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.72 : 344.61 = 151.53 : x
  2. Step 2: Convert to fraction form
    249.72/344.61 = 151.53/x
  3. Step 3: Cross multiply
    249.72x = 344.61 × 151.53
  4. Step 4: Simplify right side
    249.72x = 52,218.75
  5. Step 5: Solve for x
    x = 52,218.75/249.72
  6. Step 6: Final answer
    x = 209.11

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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.