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Finding the Fourth Proportional to 443.27, 665.21 and 424.44

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Solution

The fourth proportional to 443.27, 665.21 and 424.44 is: 636.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.27 : 665.21 = 424.44 : x
  2. Step 2: Convert to fraction form
    443.27/665.21 = 424.44/x
  3. Step 3: Cross multiply
    443.27x = 665.21 × 424.44
  4. Step 4: Simplify right side
    443.27x = 282,342.79
  5. Step 5: Solve for x
    x = 282,342.79/443.27
  6. Step 6: Final answer
    x = 636.95

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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.