Home / 2,619.82-3,930-1,159.30

Finding the Fourth Proportional to 2,619.82, 3,930 and 1,159.30

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Solution

The fourth proportional to 2,619.82, 3,930 and 1,159.30 is: 1,739.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.82 : 3,930 = 1,159.30 : x
  2. Step 2: Convert to fraction form
    2,619.82/3,930 = 1,159.30/x
  3. Step 3: Cross multiply
    2,619.82x = 3,930 × 1,159.30
  4. Step 4: Simplify right side
    2,619.82x = 4,556,049
  5. Step 5: Solve for x
    x = 4,556,049/2,619.82
  6. Step 6: Final answer
    x = 1,739.07

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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.