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Finding the Fourth Proportional to 271.90, 408.03 and 117.78

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Solution

The fourth proportional to 271.90, 408.03 and 117.78 is: 176.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.90 : 408.03 = 117.78 : x
  2. Step 2: Convert to fraction form
    271.90/408.03 = 117.78/x
  3. Step 3: Cross multiply
    271.90x = 408.03 × 117.78
  4. Step 4: Simplify right side
    271.90x = 48,057.77
  5. Step 5: Solve for x
    x = 48,057.77/271.90
  6. Step 6: Final answer
    x = 176.75

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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.