Home / 170-439

Finding the Third Proportional to 170 and 439

Calculator

Solution

The third proportional to 170 and 439 is: 1,133.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    170 : 439 = 439 : x
  2. Step 2: Convert to fraction form
    170/439 = 439/x
  3. Step 3: Cross multiply
    170x = 439 × 439
  4. Step 4: Simplify right side
    170x = 192,721
  5. Step 5: Solve for x
    x = 192,721/170
  6. Step 6: Final answer
    x = 1,133.65

Related Problems

Find third proportional to 85 and 219.50
Half scale
Find third proportional to 340 and 878
Double scale
Find third proportional to 172 and 444
Similar ratio
Find third proportional to 255 and 658.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.