Home / 868-1,315

Finding the Third Proportional to 868 and 1,315

Calculator

Solution

The third proportional to 868 and 1,315 is: 1,992.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    868 : 1,315 = 1,315 : x
  2. Step 2: Convert to fraction form
    868/1,315 = 1,315/x
  3. Step 3: Cross multiply
    868x = 1,315 × 1,315
  4. Step 4: Simplify right side
    868x = 1,729,225
  5. Step 5: Solve for x
    x = 1,729,225/868
  6. Step 6: Final answer
    x = 1,992.19

Related Problems

Find third proportional to 434 and 657.50
Half scale
Find third proportional to 1,736 and 2,630
Double scale
Find third proportional to 870 and 1,318
Similar ratio
Find third proportional to 1,302 and 1,972.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.