Home / 275,904-421,878

Finding the Third Proportional to 275,904 and 421,878

Calculator

Solution

The third proportional to 275,904 and 421,878 is: 645,083.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,904 : 421,878 = 421,878 : x
  2. Step 2: Convert to fraction form
    275,904/421,878 = 421,878/x
  3. Step 3: Cross multiply
    275,904x = 421,878 × 421,878
  4. Step 4: Simplify right side
    275,904x = 177,981,046,884
  5. Step 5: Solve for x
    x = 177,981,046,884/275,904
  6. Step 6: Final answer
    x = 645,083.24

Related Problems

Find third proportional to 137,952 and 210,939
Half scale
Find third proportional to 551,808 and 843,756
Double scale
Find third proportional to 275,906 and 421,881
Similar ratio
Find third proportional to 413,856 and 632,817
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.