Home / 1,839.12-2,758.68-540.72

Finding the Fourth Proportional to 1,839.12, 2,758.68 and 540.72

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Solution

The fourth proportional to 1,839.12, 2,758.68 and 540.72 is: 811.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,839.12 : 2,758.68 = 540.72 : x
  2. Step 2: Convert to fraction form
    1,839.12/2,758.68 = 540.72/x
  3. Step 3: Cross multiply
    1,839.12x = 2,758.68 × 540.72
  4. Step 4: Simplify right side
    1,839.12x = 1,491,673.45
  5. Step 5: Solve for x
    x = 1,491,673.45/1,839.12
  6. Step 6: Final answer
    x = 811.08

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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.