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Finding the Fourth Proportional to 271.17, 374.13 and 221.97

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Solution

The fourth proportional to 271.17, 374.13 and 221.97 is: 306.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.17 : 374.13 = 221.97 : x
  2. Step 2: Convert to fraction form
    271.17/374.13 = 221.97/x
  3. Step 3: Cross multiply
    271.17x = 374.13 × 221.97
  4. Step 4: Simplify right side
    271.17x = 83,045.64
  5. Step 5: Solve for x
    x = 83,045.64/271.17
  6. Step 6: Final answer
    x = 306.25

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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.