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Finding the Fourth Proportional to 249.12, 344.16 and 234.72

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Solution

The fourth proportional to 249.12, 344.16 and 234.72 is: 324.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.12 : 344.16 = 234.72 : x
  2. Step 2: Convert to fraction form
    249.12/344.16 = 234.72/x
  3. Step 3: Cross multiply
    249.12x = 344.16 × 234.72
  4. Step 4: Simplify right side
    249.12x = 80,781.24
  5. Step 5: Solve for x
    x = 80,781.24/249.12
  6. Step 6: Final answer
    x = 324.27

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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.