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Finding the Fourth Proportional to 252.89, 349.02 and 142.39

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Solution

The fourth proportional to 252.89, 349.02 and 142.39 is: 196.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.89 : 349.02 = 142.39 : x
  2. Step 2: Convert to fraction form
    252.89/349.02 = 142.39/x
  3. Step 3: Cross multiply
    252.89x = 349.02 × 142.39
  4. Step 4: Simplify right side
    252.89x = 49,696.09
  5. Step 5: Solve for x
    x = 49,696.09/252.89
  6. Step 6: Final answer
    x = 196.51

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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.