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Finding the Fourth Proportional to 195.81, 270.25 and 149.11

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Solution

The fourth proportional to 195.81, 270.25 and 149.11 is: 205.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.81 : 270.25 = 149.11 : x
  2. Step 2: Convert to fraction form
    195.81/270.25 = 149.11/x
  3. Step 3: Cross multiply
    195.81x = 270.25 × 149.11
  4. Step 4: Simplify right side
    195.81x = 40,295.93
  5. Step 5: Solve for x
    x = 40,295.93/195.81
  6. Step 6: Final answer
    x = 205.79

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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.