Home / 321,194-691,720

Finding the Third Proportional to 321,194 and 691,720

Calculator

Solution

The third proportional to 321,194 and 691,720 is: 1,489,680.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,194 : 691,720 = 691,720 : x
  2. Step 2: Convert to fraction form
    321,194/691,720 = 691,720/x
  3. Step 3: Cross multiply
    321,194x = 691,720 × 691,720
  4. Step 4: Simplify right side
    321,194x = 478,476,558,400
  5. Step 5: Solve for x
    x = 478,476,558,400/321,194
  6. Step 6: Final answer
    x = 1,489,680.87

Related Problems

Find third proportional to 160,597 and 345,860
Half scale
Find third proportional to 642,388 and 1,383,440
Double scale
Find third proportional to 321,196 and 691,724
Similar ratio
Find third proportional to 481,791 and 1,037,580
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.