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Finding the Fourth Proportional to 261.65, 360.92 and 191.79

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Solution

The fourth proportional to 261.65, 360.92 and 191.79 is: 264.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.65 : 360.92 = 191.79 : x
  2. Step 2: Convert to fraction form
    261.65/360.92 = 191.79/x
  3. Step 3: Cross multiply
    261.65x = 360.92 × 191.79
  4. Step 4: Simplify right side
    261.65x = 69,221.33
  5. Step 5: Solve for x
    x = 69,221.33/261.65
  6. Step 6: Final answer
    x = 264.55

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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.