Home / 2,815-3,220

Finding the Third Proportional to 2,815 and 3,220

Calculator

Solution

The third proportional to 2,815 and 3,220 is: 3,683.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815 : 3,220 = 3,220 : x
  2. Step 2: Convert to fraction form
    2,815/3,220 = 3,220/x
  3. Step 3: Cross multiply
    2,815x = 3,220 × 3,220
  4. Step 4: Simplify right side
    2,815x = 10,368,400
  5. Step 5: Solve for x
    x = 10,368,400/2,815
  6. Step 6: Final answer
    x = 3,683.27

Related Problems

Find third proportional to 1,407.50 and 1,610
Half scale
Find third proportional to 5,630 and 6,440
Double scale
Find third proportional to 2,817 and 3,222
Similar ratio
Find third proportional to 4,222.50 and 4,830
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.