Home / 2.67-4-2.57

Finding the Fourth Proportional to 2.67, 4 and 2.57

Calculator

Solution

The fourth proportional to 2.67, 4 and 2.57 is: 3.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.67 : 4 = 2.57 : x
  2. Step 2: Convert to fraction form
    2.67/4 = 2.57/x
  3. Step 3: Cross multiply
    2.67x = 4 × 2.57
  4. Step 4: Simplify right side
    2.67x = 10.28
  5. Step 5: Solve for x
    x = 10.28/2.67
  6. Step 6: Final answer
    x = 3.85

Related Problems

Find fourth proportional to 1.34, 2 and 1.29
Half scale
Find fourth proportional to 5.34, 8 and 5.14
Double scale
Find fourth proportional to 3.67, 5.50 and 3.57
Similar ratio
Find fourth proportional to 4.01, 6 and 3.86
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.