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Finding the Fourth Proportional to 665.69, 997.11 and 299.97

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Solution

The fourth proportional to 665.69, 997.11 and 299.97 is: 449.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.69 : 997.11 = 299.97 : x
  2. Step 2: Convert to fraction form
    665.69/997.11 = 299.97/x
  3. Step 3: Cross multiply
    665.69x = 997.11 × 299.97
  4. Step 4: Simplify right side
    665.69x = 299,103.09
  5. Step 5: Solve for x
    x = 299,103.09/665.69
  6. Step 6: Final answer
    x = 449.32

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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.