Home / 180-391.50

Finding the Third Proportional to 180 and 391.50

Calculator

Solution

The third proportional to 180 and 391.50 is: 851.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    180 : 391.50 = 391.50 : x
  2. Step 2: Convert to fraction form
    180/391.50 = 391.50/x
  3. Step 3: Cross multiply
    180x = 391.50 × 391.50
  4. Step 4: Simplify right side
    180x = 153,272.25
  5. Step 5: Solve for x
    x = 153,272.25/180
  6. Step 6: Final answer
    x = 851.51

Related Problems

Find third proportional to 90 and 195.75
Half scale
Find third proportional to 360 and 783
Double scale
Find third proportional to 182 and 396
Similar ratio
Find third proportional to 270 and 587.25
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.