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Finding the Fourth Proportional to 489.44, 676.04 and 396.52

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Solution

The fourth proportional to 489.44, 676.04 and 396.52 is: 547.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.44 : 676.04 = 396.52 : x
  2. Step 2: Convert to fraction form
    489.44/676.04 = 396.52/x
  3. Step 3: Cross multiply
    489.44x = 676.04 × 396.52
  4. Step 4: Simplify right side
    489.44x = 268,063.38
  5. Step 5: Solve for x
    x = 268,063.38/489.44
  6. Step 6: Final answer
    x = 547.69

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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.