Home / 155.55-218.02

Finding the Third Proportional to 155.55 and 218.02

Calculator

Solution

The third proportional to 155.55 and 218.02 is: 305.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.55 : 218.02 = 218.02 : x
  2. Step 2: Convert to fraction form
    155.55/218.02 = 218.02/x
  3. Step 3: Cross multiply
    155.55x = 218.02 × 218.02
  4. Step 4: Simplify right side
    155.55x = 47,530.81
  5. Step 5: Solve for x
    x = 47,530.81/155.55
  6. Step 6: Final answer
    x = 305.57

Related Problems

Find third proportional to 77.77 and 109.01
Half scale
Find third proportional to 311.09 and 436.03
Double scale
Find third proportional to 158 and 221
Similar ratio
Find third proportional to 233.32 and 327.02
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.