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Finding the Fourth Proportional to 261.28, 360.57 and 144.84

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Solution

The fourth proportional to 261.28, 360.57 and 144.84 is: 199.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.28 : 360.57 = 144.84 : x
  2. Step 2: Convert to fraction form
    261.28/360.57 = 144.84/x
  3. Step 3: Cross multiply
    261.28x = 360.57 × 144.84
  4. Step 4: Simplify right side
    261.28x = 52,226.85
  5. Step 5: Solve for x
    x = 52,226.85/261.28
  6. Step 6: Final answer
    x = 199.89

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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.