Home / 2,119.26-3,173.67-1,388.10

Finding the Fourth Proportional to 2,119.26, 3,173.67 and 1,388.10

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Solution

The fourth proportional to 2,119.26, 3,173.67 and 1,388.10 is: 2,078.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.26 : 3,173.67 = 1,388.10 : x
  2. Step 2: Convert to fraction form
    2,119.26/3,173.67 = 1,388.10/x
  3. Step 3: Cross multiply
    2,119.26x = 3,173.67 × 1,388.10
  4. Step 4: Simplify right side
    2,119.26x = 4,405,371.33
  5. Step 5: Solve for x
    x = 4,405,371.33/2,119.26
  6. Step 6: Final answer
    x = 2,078.73

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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.