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Finding the Fourth Proportional to 835.21, 1,243.98 and 791.29

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Solution

The fourth proportional to 835.21, 1,243.98 and 791.29 is: 1,178.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.21 : 1,243.98 = 791.29 : x
  2. Step 2: Convert to fraction form
    835.21/1,243.98 = 791.29/x
  3. Step 3: Cross multiply
    835.21x = 1,243.98 × 791.29
  4. Step 4: Simplify right side
    835.21x = 984,348.93
  5. Step 5: Solve for x
    x = 984,348.93/835.21
  6. Step 6: Final answer
    x = 1,178.56

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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.