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Finding the Fourth Proportional to 791.44, 1,185.76 and 722.84

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Solution

The fourth proportional to 791.44, 1,185.76 and 722.84 is: 1,082.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.44 : 1,185.76 = 722.84 : x
  2. Step 2: Convert to fraction form
    791.44/1,185.76 = 722.84/x
  3. Step 3: Cross multiply
    791.44x = 1,185.76 × 722.84
  4. Step 4: Simplify right side
    791.44x = 857,114.76
  5. Step 5: Solve for x
    x = 857,114.76/791.44
  6. Step 6: Final answer
    x = 1,082.98

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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.