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Finding the Fourth Proportional to 3,939.64, 5,912.03 and 1,860.23

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Solution

The fourth proportional to 3,939.64, 5,912.03 and 1,860.23 is: 2,791.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.64 : 5,912.03 = 1,860.23 : x
  2. Step 2: Convert to fraction form
    3,939.64/5,912.03 = 1,860.23/x
  3. Step 3: Cross multiply
    3,939.64x = 5,912.03 × 1,860.23
  4. Step 4: Simplify right side
    3,939.64x = 10,997,755.00
  5. Step 5: Solve for x
    x = 10,997,755.00/3,939.64
  6. Step 6: Final answer
    x = 2,791.57

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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.