Home / 125-220.25

Finding the Third Proportional to 125 and 220.25

Calculator

Solution

The third proportional to 125 and 220.25 is: 388.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    125 : 220.25 = 220.25 : x
  2. Step 2: Convert to fraction form
    125/220.25 = 220.25/x
  3. Step 3: Cross multiply
    125x = 220.25 × 220.25
  4. Step 4: Simplify right side
    125x = 48,510.06
  5. Step 5: Solve for x
    x = 48,510.06/125
  6. Step 6: Final answer
    x = 388.08

Related Problems

Find third proportional to 62.50 and 110.13
Half scale
Find third proportional to 250 and 440.50
Double scale
Find third proportional to 127 and 224
Similar ratio
Find third proportional to 187.50 and 330.38
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.