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Finding the Fourth Proportional to 144.34, 217.12 and 143.12

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Solution

The fourth proportional to 144.34, 217.12 and 143.12 is: 215.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.34 : 217.12 = 143.12 : x
  2. Step 2: Convert to fraction form
    144.34/217.12 = 143.12/x
  3. Step 3: Cross multiply
    144.34x = 217.12 × 143.12
  4. Step 4: Simplify right side
    144.34x = 31,074.21
  5. Step 5: Solve for x
    x = 31,074.21/144.34
  6. Step 6: Final answer
    x = 215.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.