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Finding the Fourth Proportional to 490.24, 676.55 and 269.19

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Solution

The fourth proportional to 490.24, 676.55 and 269.19 is: 371.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.24 : 676.55 = 269.19 : x
  2. Step 2: Convert to fraction form
    490.24/676.55 = 269.19/x
  3. Step 3: Cross multiply
    490.24x = 676.55 × 269.19
  4. Step 4: Simplify right side
    490.24x = 182,120.49
  5. Step 5: Solve for x
    x = 182,120.49/490.24
  6. Step 6: Final answer
    x = 371.49

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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.