Home / 418-860

Finding the Third Proportional to 418 and 860

Calculator

Solution

The third proportional to 418 and 860 is: 1,769.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    418 : 860 = 860 : x
  2. Step 2: Convert to fraction form
    418/860 = 860/x
  3. Step 3: Cross multiply
    418x = 860 × 860
  4. Step 4: Simplify right side
    418x = 739,600
  5. Step 5: Solve for x
    x = 739,600/418
  6. Step 6: Final answer
    x = 1,769.38

Related Problems

Find third proportional to 209 and 430
Half scale
Find third proportional to 836 and 1,720
Double scale
Find third proportional to 420 and 864
Similar ratio
Find third proportional to 627 and 1,290
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.