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Finding the Fourth Proportional to 443.79, 664.11 and 270.39

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Solution

The fourth proportional to 443.79, 664.11 and 270.39 is: 404.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.79 : 664.11 = 270.39 : x
  2. Step 2: Convert to fraction form
    443.79/664.11 = 270.39/x
  3. Step 3: Cross multiply
    443.79x = 664.11 × 270.39
  4. Step 4: Simplify right side
    443.79x = 179,568.70
  5. Step 5: Solve for x
    x = 179,568.70/443.79
  6. Step 6: Final answer
    x = 404.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.