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Finding the Fourth Proportional to 791.82, 1,092.87 and 496.98

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Solution

The fourth proportional to 791.82, 1,092.87 and 496.98 is: 685.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.82 : 1,092.87 = 496.98 : x
  2. Step 2: Convert to fraction form
    791.82/1,092.87 = 496.98/x
  3. Step 3: Cross multiply
    791.82x = 1,092.87 × 496.98
  4. Step 4: Simplify right side
    791.82x = 543,134.53
  5. Step 5: Solve for x
    x = 543,134.53/791.82
  6. Step 6: Final answer
    x = 685.93

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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.