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Finding the Fourth Proportional to 249.08, 371.49 and 221.74

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Solution

The fourth proportional to 249.08, 371.49 and 221.74 is: 330.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.08 : 371.49 = 221.74 : x
  2. Step 2: Convert to fraction form
    249.08/371.49 = 221.74/x
  3. Step 3: Cross multiply
    249.08x = 371.49 × 221.74
  4. Step 4: Simplify right side
    249.08x = 82,372.43
  5. Step 5: Solve for x
    x = 82,372.43/249.08
  6. Step 6: Final answer
    x = 330.71

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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.