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Finding the Fourth Proportional to 252.34, 378.26 and 143.90

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Solution

The fourth proportional to 252.34, 378.26 and 143.90 is: 215.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.34 : 378.26 = 143.90 : x
  2. Step 2: Convert to fraction form
    252.34/378.26 = 143.90/x
  3. Step 3: Cross multiply
    252.34x = 378.26 × 143.90
  4. Step 4: Simplify right side
    252.34x = 54,431.61
  5. Step 5: Solve for x
    x = 54,431.61/252.34
  6. Step 6: Final answer
    x = 215.71

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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.