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Finding the Fourth Proportional to 251.82, 375.59 and 221.04

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Solution

The fourth proportional to 251.82, 375.59 and 221.04 is: 329.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.82 : 375.59 = 221.04 : x
  2. Step 2: Convert to fraction form
    251.82/375.59 = 221.04/x
  3. Step 3: Cross multiply
    251.82x = 375.59 × 221.04
  4. Step 4: Simplify right side
    251.82x = 83,020.97
  5. Step 5: Solve for x
    x = 83,020.97/251.82
  6. Step 6: Final answer
    x = 329.68

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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.