Home / 128-219.50

Finding the Third Proportional to 128 and 219.50

Calculator

Solution

The third proportional to 128 and 219.50 is: 376.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128 : 219.50 = 219.50 : x
  2. Step 2: Convert to fraction form
    128/219.50 = 219.50/x
  3. Step 3: Cross multiply
    128x = 219.50 × 219.50
  4. Step 4: Simplify right side
    128x = 48,180.25
  5. Step 5: Solve for x
    x = 48,180.25/128
  6. Step 6: Final answer
    x = 376.41

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.