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Finding the Fourth Proportional to 261.32, 360.64 and 144.88

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Solution

The fourth proportional to 261.32, 360.64 and 144.88 is: 199.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.32 : 360.64 = 144.88 : x
  2. Step 2: Convert to fraction form
    261.32/360.64 = 144.88/x
  3. Step 3: Cross multiply
    261.32x = 360.64 × 144.88
  4. Step 4: Simplify right side
    261.32x = 52,247.72
  5. Step 5: Solve for x
    x = 52,247.72/261.32
  6. Step 6: Final answer
    x = 199.94

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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.