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Finding the Fourth Proportional to 252.85, 348.92 and 142.31

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Solution

The fourth proportional to 252.85, 348.92 and 142.31 is: 196.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.85 : 348.92 = 142.31 : x
  2. Step 2: Convert to fraction form
    252.85/348.92 = 142.31/x
  3. Step 3: Cross multiply
    252.85x = 348.92 × 142.31
  4. Step 4: Simplify right side
    252.85x = 49,653.74
  5. Step 5: Solve for x
    x = 49,653.74/252.85
  6. Step 6: Final answer
    x = 196.38

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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.