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Finding the Fourth Proportional to 249.45, 344.42 and 223.15

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Solution

The fourth proportional to 249.45, 344.42 and 223.15 is: 308.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.45 : 344.42 = 223.15 : x
  2. Step 2: Convert to fraction form
    249.45/344.42 = 223.15/x
  3. Step 3: Cross multiply
    249.45x = 344.42 × 223.15
  4. Step 4: Simplify right side
    249.45x = 76,855.86
  5. Step 5: Solve for x
    x = 76,855.86/249.45
  6. Step 6: Final answer
    x = 308.10

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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.