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Finding the Fourth Proportional to 664.70, 997.38 and 299.41

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Solution

The fourth proportional to 664.70, 997.38 and 299.41 is: 449.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.70 : 997.38 = 299.41 : x
  2. Step 2: Convert to fraction form
    664.70/997.38 = 299.41/x
  3. Step 3: Cross multiply
    664.70x = 997.38 × 299.41
  4. Step 4: Simplify right side
    664.70x = 298,619.06
  5. Step 5: Solve for x
    x = 298,619.06/664.70
  6. Step 6: Final answer
    x = 449.26

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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.