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Finding the Fourth Proportional to 252.95, 348.32 and 247.78

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Solution

The fourth proportional to 252.95, 348.32 and 247.78 is: 341.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.95 : 348.32 = 247.78 : x
  2. Step 2: Convert to fraction form
    252.95/348.32 = 247.78/x
  3. Step 3: Cross multiply
    252.95x = 348.32 × 247.78
  4. Step 4: Simplify right side
    252.95x = 86,306.73
  5. Step 5: Solve for x
    x = 86,306.73/252.95
  6. Step 6: Final answer
    x = 341.20

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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.