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Finding the Fourth Proportional to 827.04, 1,231.56 and 789.28

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Solution

The fourth proportional to 827.04, 1,231.56 and 789.28 is: 1,175.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.04 : 1,231.56 = 789.28 : x
  2. Step 2: Convert to fraction form
    827.04/1,231.56 = 789.28/x
  3. Step 3: Cross multiply
    827.04x = 1,231.56 × 789.28
  4. Step 4: Simplify right side
    827.04x = 972,045.68
  5. Step 5: Solve for x
    x = 972,045.68/827.04
  6. Step 6: Final answer
    x = 1,175.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.