Home / 2,839.68-3,918.78-1,778.04

Finding the Fourth Proportional to 2,839.68, 3,918.78 and 1,778.04

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Solution

The fourth proportional to 2,839.68, 3,918.78 and 1,778.04 is: 2,453.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,839.68 : 3,918.78 = 1,778.04 : x
  2. Step 2: Convert to fraction form
    2,839.68/3,918.78 = 1,778.04/x
  3. Step 3: Cross multiply
    2,839.68x = 3,918.78 × 1,778.04
  4. Step 4: Simplify right side
    2,839.68x = 6,967,747.59
  5. Step 5: Solve for x
    x = 6,967,747.59/2,839.68
  6. Step 6: Final answer
    x = 2,453.71

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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.