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Finding the Fourth Proportional to 261.18, 360.40 and 144.74

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Solution

The fourth proportional to 261.18, 360.40 and 144.74 is: 199.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.18 : 360.40 = 144.74 : x
  2. Step 2: Convert to fraction form
    261.18/360.40 = 144.74/x
  3. Step 3: Cross multiply
    261.18x = 360.40 × 144.74
  4. Step 4: Simplify right side
    261.18x = 52,164.30
  5. Step 5: Solve for x
    x = 52,164.30/261.18
  6. Step 6: Final answer
    x = 199.73

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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.