Home / 988-1,920

Finding the Third Proportional to 988 and 1,920

Calculator

Solution

The third proportional to 988 and 1,920 is: 3,731.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    988 : 1,920 = 1,920 : x
  2. Step 2: Convert to fraction form
    988/1,920 = 1,920/x
  3. Step 3: Cross multiply
    988x = 1,920 × 1,920
  4. Step 4: Simplify right side
    988x = 3,686,400
  5. Step 5: Solve for x
    x = 3,686,400/988
  6. Step 6: Final answer
    x = 3,731.17

Related Problems

Find third proportional to 494 and 960
Half scale
Find third proportional to 1,976 and 3,840
Double scale
Find third proportional to 990 and 1,924
Similar ratio
Find third proportional to 1,482 and 2,880
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.94) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.