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Finding the Fourth Proportional to 490.55, 676.97 and 269.49

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Solution

The fourth proportional to 490.55, 676.97 and 269.49 is: 371.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.55 : 676.97 = 269.49 : x
  2. Step 2: Convert to fraction form
    490.55/676.97 = 269.49/x
  3. Step 3: Cross multiply
    490.55x = 676.97 × 269.49
  4. Step 4: Simplify right side
    490.55x = 182,436.65
  5. Step 5: Solve for x
    x = 182,436.65/490.55
  6. Step 6: Final answer
    x = 371.90

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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.