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Finding the Fourth Proportional to 271.54, 407.26 and 76.55

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Solution

The fourth proportional to 271.54, 407.26 and 76.55 is: 114.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.54 : 407.26 = 76.55 : x
  2. Step 2: Convert to fraction form
    271.54/407.26 = 76.55/x
  3. Step 3: Cross multiply
    271.54x = 407.26 × 76.55
  4. Step 4: Simplify right side
    271.54x = 31,177.06
  5. Step 5: Solve for x
    x = 31,177.06/271.54
  6. Step 6: Final answer
    x = 114.82

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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.