Home / 279,734-421,924

Finding the Third Proportional to 279,734 and 421,924

Calculator

Solution

The third proportional to 279,734 and 421,924 is: 636,389.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,734 : 421,924 = 421,924 : x
  2. Step 2: Convert to fraction form
    279,734/421,924 = 421,924/x
  3. Step 3: Cross multiply
    279,734x = 421,924 × 421,924
  4. Step 4: Simplify right side
    279,734x = 178,019,861,776
  5. Step 5: Solve for x
    x = 178,019,861,776/279,734
  6. Step 6: Final answer
    x = 636,389.79

Related Problems

Find third proportional to 139,867 and 210,962
Half scale
Find third proportional to 559,468 and 843,848
Double scale
Find third proportional to 279,736 and 421,927
Similar ratio
Find third proportional to 419,601 and 632,886
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.