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Finding the Fourth Proportional to 727.54, 1,003.98 and 395.97

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Solution

The fourth proportional to 727.54, 1,003.98 and 395.97 is: 546.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.54 : 1,003.98 = 395.97 : x
  2. Step 2: Convert to fraction form
    727.54/1,003.98 = 395.97/x
  3. Step 3: Cross multiply
    727.54x = 1,003.98 × 395.97
  4. Step 4: Simplify right side
    727.54x = 397,545.96
  5. Step 5: Solve for x
    x = 397,545.96/727.54
  6. Step 6: Final answer
    x = 546.42

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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.