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Finding the Fourth Proportional to 252.79, 348.84 and 142.29

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Solution

The fourth proportional to 252.79, 348.84 and 142.29 is: 196.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.79 : 348.84 = 142.29 : x
  2. Step 2: Convert to fraction form
    252.79/348.84 = 142.29/x
  3. Step 3: Cross multiply
    252.79x = 348.84 × 142.29
  4. Step 4: Simplify right side
    252.79x = 49,635.14
  5. Step 5: Solve for x
    x = 49,635.14/252.79
  6. Step 6: Final answer
    x = 196.35

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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.