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Finding the Fourth Proportional to 843.27, 1,163.63 and 489.31

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Solution

The fourth proportional to 843.27, 1,163.63 and 489.31 is: 675.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.27 : 1,163.63 = 489.31 : x
  2. Step 2: Convert to fraction form
    843.27/1,163.63 = 489.31/x
  3. Step 3: Cross multiply
    843.27x = 1,163.63 × 489.31
  4. Step 4: Simplify right side
    843.27x = 569,367.53
  5. Step 5: Solve for x
    x = 569,367.53/843.27
  6. Step 6: Final answer
    x = 675.19

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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.