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Finding the Fourth Proportional to 249.32, 343.78 and 169.40

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Solution

The fourth proportional to 249.32, 343.78 and 169.40 is: 233.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.32 : 343.78 = 169.40 : x
  2. Step 2: Convert to fraction form
    249.32/343.78 = 169.40/x
  3. Step 3: Cross multiply
    249.32x = 343.78 × 169.40
  4. Step 4: Simplify right side
    249.32x = 58,236.77
  5. Step 5: Solve for x
    x = 58,236.77/249.32
  6. Step 6: Final answer
    x = 233.58

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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.