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Finding the Fourth Proportional to 664.50, 996.09 and 317.73

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Solution

The fourth proportional to 664.50, 996.09 and 317.73 is: 476.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.50 : 996.09 = 317.73 : x
  2. Step 2: Convert to fraction form
    664.50/996.09 = 317.73/x
  3. Step 3: Cross multiply
    664.50x = 996.09 × 317.73
  4. Step 4: Simplify right side
    664.50x = 316,487.68
  5. Step 5: Solve for x
    x = 316,487.68/664.50
  6. Step 6: Final answer
    x = 476.28

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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.