Home / 118.75-220

Finding the Third Proportional to 118.75 and 220

Calculator

Solution

The third proportional to 118.75 and 220 is: 407.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.75 : 220 = 220 : x
  2. Step 2: Convert to fraction form
    118.75/220 = 220/x
  3. Step 3: Cross multiply
    118.75x = 220 × 220
  4. Step 4: Simplify right side
    118.75x = 48,400
  5. Step 5: Solve for x
    x = 48,400/118.75
  6. Step 6: Final answer
    x = 407.58

Related Problems

Find third proportional to 59.38 and 110
Half scale
Find third proportional to 237.50 and 440
Double scale
Find third proportional to 121 and 224
Similar ratio
Find third proportional to 178.13 and 330
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.