Home / 998-1,281

Finding the Third Proportional to 998 and 1,281

Calculator

Solution

The third proportional to 998 and 1,281 is: 1,644.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    998 : 1,281 = 1,281 : x
  2. Step 2: Convert to fraction form
    998/1,281 = 1,281/x
  3. Step 3: Cross multiply
    998x = 1,281 × 1,281
  4. Step 4: Simplify right side
    998x = 1,640,961
  5. Step 5: Solve for x
    x = 1,640,961/998
  6. Step 6: Final answer
    x = 1,644.25

Related Problems

Find third proportional to 499 and 640.50
Half scale
Find third proportional to 1,996 and 2,562
Double scale
Find third proportional to 1,000 and 1,284
Similar ratio
Find third proportional to 1,497 and 1,921.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.