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Finding the Fourth Proportional to 144.64, 217.97 and 130.21

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Solution

The fourth proportional to 144.64, 217.97 and 130.21 is: 196.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.64 : 217.97 = 130.21 : x
  2. Step 2: Convert to fraction form
    144.64/217.97 = 130.21/x
  3. Step 3: Cross multiply
    144.64x = 217.97 × 130.21
  4. Step 4: Simplify right side
    144.64x = 28,380.68
  5. Step 5: Solve for x
    x = 28,380.68/144.64
  6. Step 6: Final answer
    x = 196.22

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.