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Finding the Fourth Proportional to 824.34, 1,236.36 and 531.38

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Solution

The fourth proportional to 824.34, 1,236.36 and 531.38 is: 796.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.34 : 1,236.36 = 531.38 : x
  2. Step 2: Convert to fraction form
    824.34/1,236.36 = 531.38/x
  3. Step 3: Cross multiply
    824.34x = 1,236.36 × 531.38
  4. Step 4: Simplify right side
    824.34x = 656,976.98
  5. Step 5: Solve for x
    x = 656,976.98/824.34
  6. Step 6: Final answer
    x = 796.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.