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Finding the Fourth Proportional to 490.36, 676.26 and 324.74

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Solution

The fourth proportional to 490.36, 676.26 and 324.74 is: 447.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.36 : 676.26 = 324.74 : x
  2. Step 2: Convert to fraction form
    490.36/676.26 = 324.74/x
  3. Step 3: Cross multiply
    490.36x = 676.26 × 324.74
  4. Step 4: Simplify right side
    490.36x = 219,608.67
  5. Step 5: Solve for x
    x = 219,608.67/490.36
  6. Step 6: Final answer
    x = 447.85

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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.