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Finding the Fourth Proportional to 3,991.52, 5,985.02 and 1,912.02

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Solution

The fourth proportional to 3,991.52, 5,985.02 and 1,912.02 is: 2,866.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.52 : 5,985.02 = 1,912.02 : x
  2. Step 2: Convert to fraction form
    3,991.52/5,985.02 = 1,912.02/x
  3. Step 3: Cross multiply
    3,991.52x = 5,985.02 × 1,912.02
  4. Step 4: Simplify right side
    3,991.52x = 11,443,477.94
  5. Step 5: Solve for x
    x = 11,443,477.94/3,991.52
  6. Step 6: Final answer
    x = 2,866.95

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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.