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Finding the Fourth Proportional to 271.90, 375.18 and 161.38

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Solution

The fourth proportional to 271.90, 375.18 and 161.38 is: 222.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.90 : 375.18 = 161.38 : x
  2. Step 2: Convert to fraction form
    271.90/375.18 = 161.38/x
  3. Step 3: Cross multiply
    271.90x = 375.18 × 161.38
  4. Step 4: Simplify right side
    271.90x = 60,546.55
  5. Step 5: Solve for x
    x = 60,546.55/271.90
  6. Step 6: Final answer
    x = 222.68

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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.