Home / 1,221-1,325

Finding the Third Proportional to 1,221 and 1,325

Calculator

Solution

The third proportional to 1,221 and 1,325 is: 1,437.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221 : 1,325 = 1,325 : x
  2. Step 2: Convert to fraction form
    1,221/1,325 = 1,325/x
  3. Step 3: Cross multiply
    1,221x = 1,325 × 1,325
  4. Step 4: Simplify right side
    1,221x = 1,755,625
  5. Step 5: Solve for x
    x = 1,755,625/1,221
  6. Step 6: Final answer
    x = 1,437.86

Related Problems

Find third proportional to 610.50 and 662.50
Half scale
Find third proportional to 2,442 and 2,650
Double scale
Find third proportional to 1,223 and 1,327
Similar ratio
Find third proportional to 1,831.50 and 1,987.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.