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Finding the Fourth Proportional to 248.66, 372.74 and 221.11

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Solution

The fourth proportional to 248.66, 372.74 and 221.11 is: 331.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.66 : 372.74 = 221.11 : x
  2. Step 2: Convert to fraction form
    248.66/372.74 = 221.11/x
  3. Step 3: Cross multiply
    248.66x = 372.74 × 221.11
  4. Step 4: Simplify right side
    248.66x = 82,414.50
  5. Step 5: Solve for x
    x = 82,414.50/248.66
  6. Step 6: Final answer
    x = 331.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.