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Finding the Fourth Proportional to 185.31, 276.21 and 171.46

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Solution

The fourth proportional to 185.31, 276.21 and 171.46 is: 255.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.31 : 276.21 = 171.46 : x
  2. Step 2: Convert to fraction form
    185.31/276.21 = 171.46/x
  3. Step 3: Cross multiply
    185.31x = 276.21 × 171.46
  4. Step 4: Simplify right side
    185.31x = 47,358.97
  5. Step 5: Solve for x
    x = 47,358.97/185.31
  6. Step 6: Final answer
    x = 255.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.