Home / 212.25-289.13

Finding the Third Proportional to 212.25 and 289.13

Calculator

Solution

The third proportional to 212.25 and 289.13 is: 393.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.25 : 289.13 = 289.13 : x
  2. Step 2: Convert to fraction form
    212.25/289.13 = 289.13/x
  3. Step 3: Cross multiply
    212.25x = 289.13 × 289.13
  4. Step 4: Simplify right side
    212.25x = 83,593.27
  5. Step 5: Solve for x
    x = 83,593.27/212.25
  6. Step 6: Final answer
    x = 393.84

Related Problems

Find third proportional to 106.13 and 144.56
Half scale
Find third proportional to 424.50 and 578.25
Double scale
Find third proportional to 214 and 292
Similar ratio
Find third proportional to 318.38 and 433.69
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.