Home / 227-388

Finding the Third Proportional to 227 and 388

Calculator

Solution

The third proportional to 227 and 388 is: 663.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    227 : 388 = 388 : x
  2. Step 2: Convert to fraction form
    227/388 = 388/x
  3. Step 3: Cross multiply
    227x = 388 × 388
  4. Step 4: Simplify right side
    227x = 150,544
  5. Step 5: Solve for x
    x = 150,544/227
  6. Step 6: Final answer
    x = 663.19

Related Problems

Find third proportional to 113.50 and 194
Half scale
Find third proportional to 454 and 776
Double scale
Find third proportional to 229 and 391
Similar ratio
Find third proportional to 340.50 and 582
1.5x scale

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.