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Finding the Fourth Proportional to 2,686, 3,704.50 and 1,891.96

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Solution

The fourth proportional to 2,686, 3,704.50 and 1,891.96 is: 2,609.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686 : 3,704.50 = 1,891.96 : x
  2. Step 2: Convert to fraction form
    2,686/3,704.50 = 1,891.96/x
  3. Step 3: Cross multiply
    2,686x = 3,704.50 × 1,891.96
  4. Step 4: Simplify right side
    2,686x = 7,008,765.82
  5. Step 5: Solve for x
    x = 7,008,765.82/2,686
  6. Step 6: Final answer
    x = 2,609.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.