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Finding the Fourth Proportional to 252.30, 348.15 and 141.78

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Solution

The fourth proportional to 252.30, 348.15 and 141.78 is: 195.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.30 : 348.15 = 141.78 : x
  2. Step 2: Convert to fraction form
    252.30/348.15 = 141.78/x
  3. Step 3: Cross multiply
    252.30x = 348.15 × 141.78
  4. Step 4: Simplify right side
    252.30x = 49,360.71
  5. Step 5: Solve for x
    x = 49,360.71/252.30
  6. Step 6: Final answer
    x = 195.64

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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.