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Finding the Fourth Proportional to 188.56, 260.22 and 149.68

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Solution

The fourth proportional to 188.56, 260.22 and 149.68 is: 206.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.56 : 260.22 = 149.68 : x
  2. Step 2: Convert to fraction form
    188.56/260.22 = 149.68/x
  3. Step 3: Cross multiply
    188.56x = 260.22 × 149.68
  4. Step 4: Simplify right side
    188.56x = 38,949.73
  5. Step 5: Solve for x
    x = 38,949.73/188.56
  6. Step 6: Final answer
    x = 206.56

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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.