Home / 1,987.26-2,980.92-1,121.54

Finding the Fourth Proportional to 1,987.26, 2,980.92 and 1,121.54

Calculator

Solution

The fourth proportional to 1,987.26, 2,980.92 and 1,121.54 is: 1,682.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.26 : 2,980.92 = 1,121.54 : x
  2. Step 2: Convert to fraction form
    1,987.26/2,980.92 = 1,121.54/x
  3. Step 3: Cross multiply
    1,987.26x = 2,980.92 × 1,121.54
  4. Step 4: Simplify right side
    1,987.26x = 3,343,221.02
  5. Step 5: Solve for x
    x = 3,343,221.02/1,987.26
  6. Step 6: Final answer
    x = 1,682.33

Related Problems

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.