Home / 40.50-51.75

Finding the Third Proportional to 40.50 and 51.75

Calculator

Solution

The third proportional to 40.50 and 51.75 is: 66.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.50 : 51.75 = 51.75 : x
  2. Step 2: Convert to fraction form
    40.50/51.75 = 51.75/x
  3. Step 3: Cross multiply
    40.50x = 51.75 × 51.75
  4. Step 4: Simplify right side
    40.50x = 2,678.06
  5. Step 5: Solve for x
    x = 2,678.06/40.50
  6. Step 6: Final answer
    x = 66.13

Related Problems

Find third proportional to 20.25 and 25.88
Half scale
Find third proportional to 81 and 103.50
Double scale
Find third proportional to 43 and 54
Similar ratio
Find third proportional to 60.75 and 77.63
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.