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Finding the Fourth Proportional to 261.29, 360.20 and 205.92

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Solution

The fourth proportional to 261.29, 360.20 and 205.92 is: 283.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.29 : 360.20 = 205.92 : x
  2. Step 2: Convert to fraction form
    261.29/360.20 = 205.92/x
  3. Step 3: Cross multiply
    261.29x = 360.20 × 205.92
  4. Step 4: Simplify right side
    261.29x = 74,171.35
  5. Step 5: Solve for x
    x = 74,171.35/261.29
  6. Step 6: Final answer
    x = 283.87

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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.