Home / 2,519.39-3,781.38-1,287.65

Finding the Fourth Proportional to 2,519.39, 3,781.38 and 1,287.65

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Solution

The fourth proportional to 2,519.39, 3,781.38 and 1,287.65 is: 1,932.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,519.39 : 3,781.38 = 1,287.65 : x
  2. Step 2: Convert to fraction form
    2,519.39/3,781.38 = 1,287.65/x
  3. Step 3: Cross multiply
    2,519.39x = 3,781.38 × 1,287.65
  4. Step 4: Simplify right side
    2,519.39x = 4,869,075.05
  5. Step 5: Solve for x
    x = 4,869,075.05/2,519.39
  6. Step 6: Final answer
    x = 1,932.64

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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.