Home / 171.75-258.75

Finding the Third Proportional to 171.75 and 258.75

Calculator

Solution

The third proportional to 171.75 and 258.75 is: 389.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.75 : 258.75 = 258.75 : x
  2. Step 2: Convert to fraction form
    171.75/258.75 = 258.75/x
  3. Step 3: Cross multiply
    171.75x = 258.75 × 258.75
  4. Step 4: Simplify right side
    171.75x = 66,951.56
  5. Step 5: Solve for x
    x = 66,951.56/171.75
  6. Step 6: Final answer
    x = 389.82

Related Problems

Find third proportional to 85.88 and 129.38
Half scale
Find third proportional to 343.50 and 517.50
Double scale
Find third proportional to 174 and 262
Similar ratio
Find third proportional to 257.63 and 388.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.