Home / 5.28-7.88-4

Finding the Fourth Proportional to 5.28, 7.88 and 4

Calculator

Solution

The fourth proportional to 5.28, 7.88 and 4 is: 5.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.28 : 7.88 = 4 : x
  2. Step 2: Convert to fraction form
    5.28/7.88 = 4/x
  3. Step 3: Cross multiply
    5.28x = 7.88 × 4
  4. Step 4: Simplify right side
    5.28x = 31.52
  5. Step 5: Solve for x
    x = 31.52/5.28
  6. Step 6: Final answer
    x = 5.97

Related Problems

Find fourth proportional to 2.64, 3.94 and 2
Half scale
Find fourth proportional to 10.56, 15.76 and 8
Double scale
Find fourth proportional to 6.28, 9.37 and 5
Similar ratio
Find fourth proportional to 7.92, 11.82 and 6
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.