Home / 2.68-4-2.11

Finding the Fourth Proportional to 2.68, 4 and 2.11

Calculator

Solution

The fourth proportional to 2.68, 4 and 2.11 is: 3.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.68 : 4 = 2.11 : x
  2. Step 2: Convert to fraction form
    2.68/4 = 2.11/x
  3. Step 3: Cross multiply
    2.68x = 4 × 2.11
  4. Step 4: Simplify right side
    2.68x = 8.44
  5. Step 5: Solve for x
    x = 8.44/2.68
  6. Step 6: Final answer
    x = 3.15

Related Problems

Find fourth proportional to 1.34, 2 and 1.06
Half scale
Find fourth proportional to 5.36, 8 and 4.22
Double scale
Find fourth proportional to 3.68, 5.49 and 3.11
Similar ratio
Find fourth proportional to 4.02, 6 and 3.17
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.