Home / 1,839.12-2,758.86-540.78

Finding the Fourth Proportional to 1,839.12, 2,758.86 and 540.78

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Solution

The fourth proportional to 1,839.12, 2,758.86 and 540.78 is: 811.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,839.12 : 2,758.86 = 540.78 : x
  2. Step 2: Convert to fraction form
    1,839.12/2,758.86 = 540.78/x
  3. Step 3: Cross multiply
    1,839.12x = 2,758.86 × 540.78
  4. Step 4: Simplify right side
    1,839.12x = 1,491,936.31
  5. Step 5: Solve for x
    x = 1,491,936.31/1,839.12
  6. Step 6: Final answer
    x = 811.22

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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.