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Finding the Fourth Proportional to 443.22, 665.06 and 199.91

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Solution

The fourth proportional to 443.22, 665.06 and 199.91 is: 299.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.22 : 665.06 = 199.91 : x
  2. Step 2: Convert to fraction form
    443.22/665.06 = 199.91/x
  3. Step 3: Cross multiply
    443.22x = 665.06 × 199.91
  4. Step 4: Simplify right side
    443.22x = 132,952.14
  5. Step 5: Solve for x
    x = 132,952.14/443.22
  6. Step 6: Final answer
    x = 299.97

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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.