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Finding the Fourth Proportional to 3,291.25, 4,936.92 and 982.75

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Solution

The fourth proportional to 3,291.25, 4,936.92 and 982.75 is: 1,474.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,291.25 : 4,936.92 = 982.75 : x
  2. Step 2: Convert to fraction form
    3,291.25/4,936.92 = 982.75/x
  3. Step 3: Cross multiply
    3,291.25x = 4,936.92 × 982.75
  4. Step 4: Simplify right side
    3,291.25x = 4,851,758.13
  5. Step 5: Solve for x
    x = 4,851,758.13/3,291.25
  6. Step 6: Final answer
    x = 1,474.14

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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.