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Finding the Fourth Proportional to 271.18, 406.57 and 108.78

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Solution

The fourth proportional to 271.18, 406.57 and 108.78 is: 163.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.18 : 406.57 = 108.78 : x
  2. Step 2: Convert to fraction form
    271.18/406.57 = 108.78/x
  3. Step 3: Cross multiply
    271.18x = 406.57 × 108.78
  4. Step 4: Simplify right side
    271.18x = 44,224.38
  5. Step 5: Solve for x
    x = 44,224.38/271.18
  6. Step 6: Final answer
    x = 163.08

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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.