Home / 211-445

Finding the Third Proportional to 211 and 445

Calculator

Solution

The third proportional to 211 and 445 is: 938.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    211 : 445 = 445 : x
  2. Step 2: Convert to fraction form
    211/445 = 445/x
  3. Step 3: Cross multiply
    211x = 445 × 445
  4. Step 4: Simplify right side
    211x = 198,025
  5. Step 5: Solve for x
    x = 198,025/211
  6. Step 6: Final answer
    x = 938.51

Related Problems

Find third proportional to 105.50 and 222.50
Half scale
Find third proportional to 422 and 890
Double scale
Find third proportional to 213 and 449
Similar ratio
Find third proportional to 316.50 and 667.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.