Home / 2,119.88-3,179.66-949.40

Finding the Fourth Proportional to 2,119.88, 3,179.66 and 949.40

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Solution

The fourth proportional to 2,119.88, 3,179.66 and 949.40 is: 1,424.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.88 : 3,179.66 = 949.40 : x
  2. Step 2: Convert to fraction form
    2,119.88/3,179.66 = 949.40/x
  3. Step 3: Cross multiply
    2,119.88x = 3,179.66 × 949.40
  4. Step 4: Simplify right side
    2,119.88x = 3,018,769.20
  5. Step 5: Solve for x
    x = 3,018,769.20/2,119.88
  6. Step 6: Final answer
    x = 1,424.03

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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.