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Finding the Fourth Proportional to 3,939.06, 5,912.24 and 1,992.63

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Solution

The fourth proportional to 3,939.06, 5,912.24 and 1,992.63 is: 2,990.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.06 : 5,912.24 = 1,992.63 : x
  2. Step 2: Convert to fraction form
    3,939.06/5,912.24 = 1,992.63/x
  3. Step 3: Cross multiply
    3,939.06x = 5,912.24 × 1,992.63
  4. Step 4: Simplify right side
    3,939.06x = 11,780,896.83
  5. Step 5: Solve for x
    x = 11,780,896.83/3,939.06
  6. Step 6: Final answer
    x = 2,990.79

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1.5x scale

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.