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Finding the Fourth Proportional to 727.46, 1,003.62 and 447.47

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Solution

The fourth proportional to 727.46, 1,003.62 and 447.47 is: 617.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.46 : 1,003.62 = 447.47 : x
  2. Step 2: Convert to fraction form
    727.46/1,003.62 = 447.47/x
  3. Step 3: Cross multiply
    727.46x = 1,003.62 × 447.47
  4. Step 4: Simplify right side
    727.46x = 449,082.59
  5. Step 5: Solve for x
    x = 449,082.59/727.46
  6. Step 6: Final answer
    x = 617.33

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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.