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Finding the Fourth Proportional to 249.67, 344.78 and 191.35

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Solution

The fourth proportional to 249.67, 344.78 and 191.35 is: 264.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.67 : 344.78 = 191.35 : x
  2. Step 2: Convert to fraction form
    249.67/344.78 = 191.35/x
  3. Step 3: Cross multiply
    249.67x = 344.78 × 191.35
  4. Step 4: Simplify right side
    249.67x = 65,972.55
  5. Step 5: Solve for x
    x = 65,972.55/249.67
  6. Step 6: Final answer
    x = 264.24

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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.