Home / 6.38-8.80-6

Finding the Fourth Proportional to 6.38, 8.80 and 6

Calculator

Solution

The fourth proportional to 6.38, 8.80 and 6 is: 8.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.38 : 8.80 = 6 : x
  2. Step 2: Convert to fraction form
    6.38/8.80 = 6/x
  3. Step 3: Cross multiply
    6.38x = 8.80 × 6
  4. Step 4: Simplify right side
    6.38x = 52.80
  5. Step 5: Solve for x
    x = 52.80/6.38
  6. Step 6: Final answer
    x = 8.28

Related Problems

Find fourth proportional to 3.19, 4.40 and 3
Half scale
Find fourth proportional to 12.76, 17.60 and 12
Double scale
Find fourth proportional to 7.38, 10.18 and 7
Similar ratio
Find fourth proportional to 9.57, 13.20 and 9
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.