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Finding the Fourth Proportional to 246.97, 340.78 and 140.63

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Solution

The fourth proportional to 246.97, 340.78 and 140.63 is: 194.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.97 : 340.78 = 140.63 : x
  2. Step 2: Convert to fraction form
    246.97/340.78 = 140.63/x
  3. Step 3: Cross multiply
    246.97x = 340.78 × 140.63
  4. Step 4: Simplify right side
    246.97x = 47,922.10
  5. Step 5: Solve for x
    x = 47,922.10/246.97
  6. Step 6: Final answer
    x = 194.04

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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.