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Finding the Fourth Proportional to 249.18, 372 and 221.84

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Solution

The fourth proportional to 249.18, 372 and 221.84 is: 331.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.18 : 372 = 221.84 : x
  2. Step 2: Convert to fraction form
    249.18/372 = 221.84/x
  3. Step 3: Cross multiply
    249.18x = 372 × 221.84
  4. Step 4: Simplify right side
    249.18x = 82,524.48
  5. Step 5: Solve for x
    x = 82,524.48/249.18
  6. Step 6: Final answer
    x = 331.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.