Home / 171.75-218.50

Finding the Third Proportional to 171.75 and 218.50

Calculator

Solution

The third proportional to 171.75 and 218.50 is: 277.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.75 : 218.50 = 218.50 : x
  2. Step 2: Convert to fraction form
    171.75/218.50 = 218.50/x
  3. Step 3: Cross multiply
    171.75x = 218.50 × 218.50
  4. Step 4: Simplify right side
    171.75x = 47,742.25
  5. Step 5: Solve for x
    x = 47,742.25/171.75
  6. Step 6: Final answer
    x = 277.98

Related Problems

Find third proportional to 85.88 and 109.25
Half scale
Find third proportional to 343.50 and 437
Double scale
Find third proportional to 174 and 221
Similar ratio
Find third proportional to 257.63 and 327.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.