Home / 143,388-221,917

Finding the Third Proportional to 143,388 and 221,917

Calculator

Solution

The third proportional to 143,388 and 221,917 is: 343,453.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,388 : 221,917 = 221,917 : x
  2. Step 2: Convert to fraction form
    143,388/221,917 = 221,917/x
  3. Step 3: Cross multiply
    143,388x = 221,917 × 221,917
  4. Step 4: Simplify right side
    143,388x = 49,247,154,889
  5. Step 5: Solve for x
    x = 49,247,154,889/143,388
  6. Step 6: Final answer
    x = 343,453.81

Related Problems

Find third proportional to 71,694 and 110,958.50
Half scale
Find third proportional to 286,776 and 443,834
Double scale
Find third proportional to 143,390 and 221,920
Similar ratio
Find third proportional to 215,082 and 332,875.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.