Home / 1,936.11-2,670.78-1,189.80

Finding the Fourth Proportional to 1,936.11, 2,670.78 and 1,189.80

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Solution

The fourth proportional to 1,936.11, 2,670.78 and 1,189.80 is: 1,641.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,936.11 : 2,670.78 = 1,189.80 : x
  2. Step 2: Convert to fraction form
    1,936.11/2,670.78 = 1,189.80/x
  3. Step 3: Cross multiply
    1,936.11x = 2,670.78 × 1,189.80
  4. Step 4: Simplify right side
    1,936.11x = 3,177,694.04
  5. Step 5: Solve for x
    x = 3,177,694.04/1,936.11
  6. Step 6: Final answer
    x = 1,641.28

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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.