Home / 831-939

Finding the Third Proportional to 831 and 939

Calculator

Solution

The third proportional to 831 and 939 is: 1,061.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    831 : 939 = 939 : x
  2. Step 2: Convert to fraction form
    831/939 = 939/x
  3. Step 3: Cross multiply
    831x = 939 × 939
  4. Step 4: Simplify right side
    831x = 881,721
  5. Step 5: Solve for x
    x = 881,721/831
  6. Step 6: Final answer
    x = 1,061.04

Related Problems

Find third proportional to 415.50 and 469.50
Half scale
Find third proportional to 1,662 and 1,878
Double scale
Find third proportional to 833 and 941
Similar ratio
Find third proportional to 1,246.50 and 1,408.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.