Home / 876-1,686

Finding the Third Proportional to 876 and 1,686

Calculator

Solution

The third proportional to 876 and 1,686 is: 3,244.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    876 : 1,686 = 1,686 : x
  2. Step 2: Convert to fraction form
    876/1,686 = 1,686/x
  3. Step 3: Cross multiply
    876x = 1,686 × 1,686
  4. Step 4: Simplify right side
    876x = 2,842,596
  5. Step 5: Solve for x
    x = 2,842,596/876
  6. Step 6: Final answer
    x = 3,244.97

Related Problems

Find third proportional to 438 and 843
Half scale
Find third proportional to 1,752 and 3,372
Double scale
Find third proportional to 878 and 1,690
Similar ratio
Find third proportional to 1,314 and 2,529
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.92) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.