Home / 879-1,920

Finding the Third Proportional to 879 and 1,920

Calculator

Solution

The third proportional to 879 and 1,920 is: 4,193.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    879 : 1,920 = 1,920 : x
  2. Step 2: Convert to fraction form
    879/1,920 = 1,920/x
  3. Step 3: Cross multiply
    879x = 1,920 × 1,920
  4. Step 4: Simplify right side
    879x = 3,686,400
  5. Step 5: Solve for x
    x = 3,686,400/879
  6. Step 6: Final answer
    x = 4,193.86

Related Problems

Find third proportional to 439.50 and 960
Half scale
Find third proportional to 1,758 and 3,840
Double scale
Find third proportional to 881 and 1,924
Similar ratio
Find third proportional to 1,318.50 and 2,880
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.