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Finding the Fourth Proportional to 664.61, 997.34 and 299.39

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Solution

The fourth proportional to 664.61, 997.34 and 299.39 is: 449.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.61 : 997.34 = 299.39 : x
  2. Step 2: Convert to fraction form
    664.61/997.34 = 299.39/x
  3. Step 3: Cross multiply
    664.61x = 997.34 × 299.39
  4. Step 4: Simplify right side
    664.61x = 298,596.86
  5. Step 5: Solve for x
    x = 298,596.86/664.61
  6. Step 6: Final answer
    x = 449.28

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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.