Home / 2,119.56-3,179.54-1,079.11

Finding the Fourth Proportional to 2,119.56, 3,179.54 and 1,079.11

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Solution

The fourth proportional to 2,119.56, 3,179.54 and 1,079.11 is: 1,618.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.56 : 3,179.54 = 1,079.11 : x
  2. Step 2: Convert to fraction form
    2,119.56/3,179.54 = 1,079.11/x
  3. Step 3: Cross multiply
    2,119.56x = 3,179.54 × 1,079.11
  4. Step 4: Simplify right side
    2,119.56x = 3,431,073.41
  5. Step 5: Solve for x
    x = 3,431,073.41/2,119.56
  6. Step 6: Final answer
    x = 1,618.77

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1.5x scale

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.