Home / 1,980-3,085

Finding the Third Proportional to 1,980 and 3,085

Calculator

Solution

The third proportional to 1,980 and 3,085 is: 4,806.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980 : 3,085 = 3,085 : x
  2. Step 2: Convert to fraction form
    1,980/3,085 = 3,085/x
  3. Step 3: Cross multiply
    1,980x = 3,085 × 3,085
  4. Step 4: Simplify right side
    1,980x = 9,517,225
  5. Step 5: Solve for x
    x = 9,517,225/1,980
  6. Step 6: Final answer
    x = 4,806.68

Related Problems

Find third proportional to 990 and 1,542.50
Half scale
Find third proportional to 3,960 and 6,170
Double scale
Find third proportional to 1,982 and 3,088
Similar ratio
Find third proportional to 2,970 and 4,627.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.