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Finding the Fourth Proportional to 246.38, 340.07 and 142.88

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Solution

The fourth proportional to 246.38, 340.07 and 142.88 is: 197.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.38 : 340.07 = 142.88 : x
  2. Step 2: Convert to fraction form
    246.38/340.07 = 142.88/x
  3. Step 3: Cross multiply
    246.38x = 340.07 × 142.88
  4. Step 4: Simplify right side
    246.38x = 48,586.79
  5. Step 5: Solve for x
    x = 48,586.79/246.38
  6. Step 6: Final answer
    x = 197.21

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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.