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Finding the Fourth Proportional to 271.92, 375.12 and 161.40

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Solution

The fourth proportional to 271.92, 375.12 and 161.40 is: 222.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.92 : 375.12 = 161.40 : x
  2. Step 2: Convert to fraction form
    271.92/375.12 = 161.40/x
  3. Step 3: Cross multiply
    271.92x = 375.12 × 161.40
  4. Step 4: Simplify right side
    271.92x = 60,544.37
  5. Step 5: Solve for x
    x = 60,544.37/271.92
  6. Step 6: Final answer
    x = 222.66

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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.