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Finding the Fourth Proportional to 186.88, 257.92 and 108.22

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Solution

The fourth proportional to 186.88, 257.92 and 108.22 is: 149.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.88 : 257.92 = 108.22 : x
  2. Step 2: Convert to fraction form
    186.88/257.92 = 108.22/x
  3. Step 3: Cross multiply
    186.88x = 257.92 × 108.22
  4. Step 4: Simplify right side
    186.88x = 27,912.10
  5. Step 5: Solve for x
    x = 27,912.10/186.88
  6. Step 6: Final answer
    x = 149.36

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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.