Home / 218-418

Finding the Third Proportional to 218 and 418

Calculator

Solution

The third proportional to 218 and 418 is: 801.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    218 : 418 = 418 : x
  2. Step 2: Convert to fraction form
    218/418 = 418/x
  3. Step 3: Cross multiply
    218x = 418 × 418
  4. Step 4: Simplify right side
    218x = 174,724
  5. Step 5: Solve for x
    x = 174,724/218
  6. Step 6: Final answer
    x = 801.49

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.92) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.