Home / 320,228-689,940

Finding the Third Proportional to 320,228 and 689,940

Calculator

Solution

The third proportional to 320,228 and 689,940 is: 1,486,494.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,228 : 689,940 = 689,940 : x
  2. Step 2: Convert to fraction form
    320,228/689,940 = 689,940/x
  3. Step 3: Cross multiply
    320,228x = 689,940 × 689,940
  4. Step 4: Simplify right side
    320,228x = 476,017,203,600
  5. Step 5: Solve for x
    x = 476,017,203,600/320,228
  6. Step 6: Final answer
    x = 1,486,494.63

Related Problems

Find third proportional to 160,114 and 344,970
Half scale
Find third proportional to 640,456 and 1,379,880
Double scale
Find third proportional to 320,230 and 689,944
Similar ratio
Find third proportional to 480,342 and 1,034,910
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.