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Finding the Fourth Proportional to 443.26, 665.31 and 320.95

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Solution

The fourth proportional to 443.26, 665.31 and 320.95 is: 481.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.26 : 665.31 = 320.95 : x
  2. Step 2: Convert to fraction form
    443.26/665.31 = 320.95/x
  3. Step 3: Cross multiply
    443.26x = 665.31 × 320.95
  4. Step 4: Simplify right side
    443.26x = 213,527.92
  5. Step 5: Solve for x
    x = 213,527.92/443.26
  6. Step 6: Final answer
    x = 481.73

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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.