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Finding the Fourth Proportional to 791.95, 1,187.02 and 517.57

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Solution

The fourth proportional to 791.95, 1,187.02 and 517.57 is: 775.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.95 : 1,187.02 = 517.57 : x
  2. Step 2: Convert to fraction form
    791.95/1,187.02 = 517.57/x
  3. Step 3: Cross multiply
    791.95x = 1,187.02 × 517.57
  4. Step 4: Simplify right side
    791.95x = 614,365.94
  5. Step 5: Solve for x
    x = 614,365.94/791.95
  6. Step 6: Final answer
    x = 775.76

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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.