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Finding the Fourth Proportional to 843.52, 1,163.52 and 528.80

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Solution

The fourth proportional to 843.52, 1,163.52 and 528.80 is: 729.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.52 : 1,163.52 = 528.80 : x
  2. Step 2: Convert to fraction form
    843.52/1,163.52 = 528.80/x
  3. Step 3: Cross multiply
    843.52x = 1,163.52 × 528.80
  4. Step 4: Simplify right side
    843.52x = 615,269.38
  5. Step 5: Solve for x
    x = 615,269.38/843.52
  6. Step 6: Final answer
    x = 729.41

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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.