Home / 1,977.82-2,729.60-1,138.56

Finding the Fourth Proportional to 1,977.82, 2,729.60 and 1,138.56

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Solution

The fourth proportional to 1,977.82, 2,729.60 and 1,138.56 is: 1,571.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.82 : 2,729.60 = 1,138.56 : x
  2. Step 2: Convert to fraction form
    1,977.82/2,729.60 = 1,138.56/x
  3. Step 3: Cross multiply
    1,977.82x = 2,729.60 × 1,138.56
  4. Step 4: Simplify right side
    1,977.82x = 3,107,794.04
  5. Step 5: Solve for x
    x = 3,107,794.04/1,977.82
  6. Step 6: Final answer
    x = 1,571.32

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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.