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Finding the Fourth Proportional to 489.67, 676.02 and 324.28

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Solution

The fourth proportional to 489.67, 676.02 and 324.28 is: 447.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.67 : 676.02 = 324.28 : x
  2. Step 2: Convert to fraction form
    489.67/676.02 = 324.28/x
  3. Step 3: Cross multiply
    489.67x = 676.02 × 324.28
  4. Step 4: Simplify right side
    489.67x = 219,219.77
  5. Step 5: Solve for x
    x = 219,219.77/489.67
  6. Step 6: Final answer
    x = 447.69

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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.