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Finding the Fourth Proportional to 3,999.18, 5,995.86 and 1,890.06

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Solution

The fourth proportional to 3,999.18, 5,995.86 and 1,890.06 is: 2,833.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.18 : 5,995.86 = 1,890.06 : x
  2. Step 2: Convert to fraction form
    3,999.18/5,995.86 = 1,890.06/x
  3. Step 3: Cross multiply
    3,999.18x = 5,995.86 × 1,890.06
  4. Step 4: Simplify right side
    3,999.18x = 11,332,535.15
  5. Step 5: Solve for x
    x = 11,332,535.15/3,999.18
  6. Step 6: Final answer
    x = 2,833.71

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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.