Home / 143,838-313,920

Finding the Third Proportional to 143,838 and 313,920

Calculator

Solution

The third proportional to 143,838 and 313,920 is: 685,116.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,838 : 313,920 = 313,920 : x
  2. Step 2: Convert to fraction form
    143,838/313,920 = 313,920/x
  3. Step 3: Cross multiply
    143,838x = 313,920 × 313,920
  4. Step 4: Simplify right side
    143,838x = 98,545,766,400
  5. Step 5: Solve for x
    x = 98,545,766,400/143,838
  6. Step 6: Final answer
    x = 685,116.36

Related Problems

Find third proportional to 71,919 and 156,960
Half scale
Find third proportional to 287,676 and 627,840
Double scale
Find third proportional to 143,840 and 313,924
Similar ratio
Find third proportional to 215,757 and 470,880
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.