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Finding the Fourth Proportional to 261.22, 360.03 and 195.61

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Solution

The fourth proportional to 261.22, 360.03 and 195.61 is: 269.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.22 : 360.03 = 195.61 : x
  2. Step 2: Convert to fraction form
    261.22/360.03 = 195.61/x
  3. Step 3: Cross multiply
    261.22x = 360.03 × 195.61
  4. Step 4: Simplify right side
    261.22x = 70,425.47
  5. Step 5: Solve for x
    x = 70,425.47/261.22
  6. Step 6: Final answer
    x = 269.60

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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.