Home / 211.31-349.13

Finding the Third Proportional to 211.31 and 349.13

Calculator

Solution

The third proportional to 211.31 and 349.13 is: 576.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.31 : 349.13 = 349.13 : x
  2. Step 2: Convert to fraction form
    211.31/349.13 = 349.13/x
  3. Step 3: Cross multiply
    211.31x = 349.13 × 349.13
  4. Step 4: Simplify right side
    211.31x = 121,888.27
  5. Step 5: Solve for x
    x = 121,888.27/211.31
  6. Step 6: Final answer
    x = 576.82

Related Problems

Find third proportional to 105.66 and 174.56
Half scale
Find third proportional to 422.63 and 698.25
Double scale
Find third proportional to 213 and 352
Similar ratio
Find third proportional to 316.97 and 523.69
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.