Home / 155.31-211.44

Finding the Third Proportional to 155.31 and 211.44

Calculator

Solution

The third proportional to 155.31 and 211.44 is: 287.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.31 : 211.44 = 211.44 : x
  2. Step 2: Convert to fraction form
    155.31/211.44 = 211.44/x
  3. Step 3: Cross multiply
    155.31x = 211.44 × 211.44
  4. Step 4: Simplify right side
    155.31x = 44,705.82
  5. Step 5: Solve for x
    x = 44,705.82/155.31
  6. Step 6: Final answer
    x = 287.84

Related Problems

Find third proportional to 77.66 and 105.72
Half scale
Find third proportional to 310.63 and 422.88
Double scale
Find third proportional to 157 and 214
Similar ratio
Find third proportional to 232.97 and 317.16
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.