Home / 399,920-869,824

Finding the Third Proportional to 399,920 and 869,824

Calculator

Solution

The third proportional to 399,920 and 869,824 is: 1,891,862.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,920 : 869,824 = 869,824 : x
  2. Step 2: Convert to fraction form
    399,920/869,824 = 869,824/x
  3. Step 3: Cross multiply
    399,920x = 869,824 × 869,824
  4. Step 4: Simplify right side
    399,920x = 756,593,790,976
  5. Step 5: Solve for x
    x = 756,593,790,976/399,920
  6. Step 6: Final answer
    x = 1,891,862.85

Related Problems

Find third proportional to 199,960 and 434,912
Half scale
Find third proportional to 799,840 and 1,739,648
Double scale
Find third proportional to 399,922 and 869,828
Similar ratio
Find third proportional to 599,880 and 1,304,736
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.