Home / 4-6-3.16

Finding the Fourth Proportional to 4, 6 and 3.16

Calculator

Solution

The fourth proportional to 4, 6 and 3.16 is: 4.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    4 : 6 = 3.16 : x
  2. Step 2: Convert to fraction form
    4/6 = 3.16/x
  3. Step 3: Cross multiply
    4x = 6 × 3.16
  4. Step 4: Simplify right side
    4x = 18.93
  5. Step 5: Solve for x
    x = 18.93/4
  6. Step 6: Final answer
    x = 4.73

Related Problems

Find fourth proportional to 2, 3 and 1.58
Half scale
Find fourth proportional to 8, 12 and 6.31
Double scale
Find fourth proportional to 5, 7.50 and 4.16
Similar ratio
Find fourth proportional to 6, 9 and 4.73
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.