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Finding the Fourth Proportional to 664.32, 996.32 and 447.04

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Solution

The fourth proportional to 664.32, 996.32 and 447.04 is: 670.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.32 : 996.32 = 447.04 : x
  2. Step 2: Convert to fraction form
    664.32/996.32 = 447.04/x
  3. Step 3: Cross multiply
    664.32x = 996.32 × 447.04
  4. Step 4: Simplify right side
    664.32x = 445,394.89
  5. Step 5: Solve for x
    x = 445,394.89/664.32
  6. Step 6: Final answer
    x = 670.45

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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.