Home / 981-1,121

Finding the Third Proportional to 981 and 1,121

Calculator

Solution

The third proportional to 981 and 1,121 is: 1,280.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    981 : 1,121 = 1,121 : x
  2. Step 2: Convert to fraction form
    981/1,121 = 1,121/x
  3. Step 3: Cross multiply
    981x = 1,121 × 1,121
  4. Step 4: Simplify right side
    981x = 1,256,641
  5. Step 5: Solve for x
    x = 1,256,641/981
  6. Step 6: Final answer
    x = 1,280.98

Related Problems

Find third proportional to 490.50 and 560.50
Half scale
Find third proportional to 1,962 and 2,242
Double scale
Find third proportional to 983 and 1,123
Similar ratio
Find third proportional to 1,471.50 and 1,681.50
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.