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Finding the Fourth Proportional to 342.26, 472.31 and 187

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Solution

The fourth proportional to 342.26, 472.31 and 187 is: 258.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.26 : 472.31 = 187 : x
  2. Step 2: Convert to fraction form
    342.26/472.31 = 187/x
  3. Step 3: Cross multiply
    342.26x = 472.31 × 187
  4. Step 4: Simplify right side
    342.26x = 88,321.97
  5. Step 5: Solve for x
    x = 88,321.97/342.26
  6. Step 6: Final answer
    x = 258.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.