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Finding the Fourth Proportional to 261.23, 360.39 and 161.57

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Solution

The fourth proportional to 261.23, 360.39 and 161.57 is: 222.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.23 : 360.39 = 161.57 : x
  2. Step 2: Convert to fraction form
    261.23/360.39 = 161.57/x
  3. Step 3: Cross multiply
    261.23x = 360.39 × 161.57
  4. Step 4: Simplify right side
    261.23x = 58,228.21
  5. Step 5: Solve for x
    x = 58,228.21/261.23
  6. Step 6: Final answer
    x = 222.90

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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.