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Finding the Fourth Proportional to 2,091.93, 3,138.14 and 775.37

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Solution

The fourth proportional to 2,091.93, 3,138.14 and 775.37 is: 1,163.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.93 : 3,138.14 = 775.37 : x
  2. Step 2: Convert to fraction form
    2,091.93/3,138.14 = 775.37/x
  3. Step 3: Cross multiply
    2,091.93x = 3,138.14 × 775.37
  4. Step 4: Simplify right side
    2,091.93x = 2,433,229.40
  5. Step 5: Solve for x
    x = 2,433,229.40/2,091.93
  6. Step 6: Final answer
    x = 1,163.15

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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.