Home / 725-1,420

Finding the Third Proportional to 725 and 1,420

Calculator

Solution

The third proportional to 725 and 1,420 is: 2,781.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    725 : 1,420 = 1,420 : x
  2. Step 2: Convert to fraction form
    725/1,420 = 1,420/x
  3. Step 3: Cross multiply
    725x = 1,420 × 1,420
  4. Step 4: Simplify right side
    725x = 2,016,400
  5. Step 5: Solve for x
    x = 2,016,400/725
  6. Step 6: Final answer
    x = 2,781.24

Related Problems

Find third proportional to 362.50 and 710
Half scale
Find third proportional to 1,450 and 2,840
Double scale
Find third proportional to 727 and 1,424
Similar ratio
Find third proportional to 1,087.50 and 2,130
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.96) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.