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Finding the Fourth Proportional to 984.34, 1,474.08 and 791.56

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Solution

The fourth proportional to 984.34, 1,474.08 and 791.56 is: 1,185.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.34 : 1,474.08 = 791.56 : x
  2. Step 2: Convert to fraction form
    984.34/1,474.08 = 791.56/x
  3. Step 3: Cross multiply
    984.34x = 1,474.08 × 791.56
  4. Step 4: Simplify right side
    984.34x = 1,166,822.76
  5. Step 5: Solve for x
    x = 1,166,822.76/984.34
  6. Step 6: Final answer
    x = 1,185.39

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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.