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Finding the Fourth Proportional to 664.78, 996.36 and 482.80

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Solution

The fourth proportional to 664.78, 996.36 and 482.80 is: 723.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.78 : 996.36 = 482.80 : x
  2. Step 2: Convert to fraction form
    664.78/996.36 = 482.80/x
  3. Step 3: Cross multiply
    664.78x = 996.36 × 482.80
  4. Step 4: Simplify right side
    664.78x = 481,042.61
  5. Step 5: Solve for x
    x = 481,042.61/664.78
  6. Step 6: Final answer
    x = 723.61

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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.