Home / 2,920-3,400

Finding the Third Proportional to 2,920 and 3,400

Calculator

Solution

The third proportional to 2,920 and 3,400 is: 3,958.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920 : 3,400 = 3,400 : x
  2. Step 2: Convert to fraction form
    2,920/3,400 = 3,400/x
  3. Step 3: Cross multiply
    2,920x = 3,400 × 3,400
  4. Step 4: Simplify right side
    2,920x = 11,560,000
  5. Step 5: Solve for x
    x = 11,560,000/2,920
  6. Step 6: Final answer
    x = 3,958.90

Related Problems

Find third proportional to 1,460 and 1,700
Half scale
Find third proportional to 5,840 and 6,800
Double scale
Find third proportional to 2,922 and 3,402
Similar ratio
Find third proportional to 4,380 and 5,100
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.