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Finding the Fourth Proportional to 261.17, 360.39 and 144.73

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Solution

The fourth proportional to 261.17, 360.39 and 144.73 is: 199.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.17 : 360.39 = 144.73 : x
  2. Step 2: Convert to fraction form
    261.17/360.39 = 144.73/x
  3. Step 3: Cross multiply
    261.17x = 360.39 × 144.73
  4. Step 4: Simplify right side
    261.17x = 52,159.24
  5. Step 5: Solve for x
    x = 52,159.24/261.17
  6. Step 6: Final answer
    x = 199.71

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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.