Home / 2,079.19-3,119.30-618.33

Finding the Fourth Proportional to 2,079.19, 3,119.30 and 618.33

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Solution

The fourth proportional to 2,079.19, 3,119.30 and 618.33 is: 927.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.19 : 3,119.30 = 618.33 : x
  2. Step 2: Convert to fraction form
    2,079.19/3,119.30 = 618.33/x
  3. Step 3: Cross multiply
    2,079.19x = 3,119.30 × 618.33
  4. Step 4: Simplify right side
    2,079.19x = 1,928,765.37
  5. Step 5: Solve for x
    x = 1,928,765.37/2,079.19
  6. Step 6: Final answer
    x = 927.65

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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.