Home / 398,902-872,900

Finding the Third Proportional to 398,902 and 872,900

Calculator

Solution

The third proportional to 398,902 and 872,900 is: 1,910,129.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,902 : 872,900 = 872,900 : x
  2. Step 2: Convert to fraction form
    398,902/872,900 = 872,900/x
  3. Step 3: Cross multiply
    398,902x = 872,900 × 872,900
  4. Step 4: Simplify right side
    398,902x = 761,954,410,000
  5. Step 5: Solve for x
    x = 761,954,410,000/398,902
  6. Step 6: Final answer
    x = 1,910,129.33

Related Problems

Find third proportional to 199,451 and 436,450
Half scale
Find third proportional to 797,804 and 1,745,800
Double scale
Find third proportional to 398,904 and 872,904
Similar ratio
Find third proportional to 598,353 and 1,309,350
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.