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Finding the Fourth Proportional to 271.42, 406.86 and 117.28

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Solution

The fourth proportional to 271.42, 406.86 and 117.28 is: 175.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.42 : 406.86 = 117.28 : x
  2. Step 2: Convert to fraction form
    271.42/406.86 = 117.28/x
  3. Step 3: Cross multiply
    271.42x = 406.86 × 117.28
  4. Step 4: Simplify right side
    271.42x = 47,716.54
  5. Step 5: Solve for x
    x = 47,716.54/271.42
  6. Step 6: Final answer
    x = 175.80

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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.