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Finding the Fourth Proportional to 727.94, 1,003.97 and 447.68

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Solution

The fourth proportional to 727.94, 1,003.97 and 447.68 is: 617.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.94 : 1,003.97 = 447.68 : x
  2. Step 2: Convert to fraction form
    727.94/1,003.97 = 447.68/x
  3. Step 3: Cross multiply
    727.94x = 1,003.97 × 447.68
  4. Step 4: Simplify right side
    727.94x = 449,452.27
  5. Step 5: Solve for x
    x = 449,452.27/727.94
  6. Step 6: Final answer
    x = 617.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.