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Finding the Fourth Proportional to 246.31, 339.79 and 142.75

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Solution

The fourth proportional to 246.31, 339.79 and 142.75 is: 196.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.31 : 339.79 = 142.75 : x
  2. Step 2: Convert to fraction form
    246.31/339.79 = 142.75/x
  3. Step 3: Cross multiply
    246.31x = 339.79 × 142.75
  4. Step 4: Simplify right side
    246.31x = 48,505.02
  5. Step 5: Solve for x
    x = 48,505.02/246.31
  6. Step 6: Final answer
    x = 196.93

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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.