Home / 328.97-509.39

Finding the Third Proportional to 328.97 and 509.39

Calculator

Solution

The third proportional to 328.97 and 509.39 is: 788.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.97 : 509.39 = 509.39 : x
  2. Step 2: Convert to fraction form
    328.97/509.39 = 509.39/x
  3. Step 3: Cross multiply
    328.97x = 509.39 × 509.39
  4. Step 4: Simplify right side
    328.97x = 259,478.81
  5. Step 5: Solve for x
    x = 259,478.81/328.97
  6. Step 6: Final answer
    x = 788.76

Related Problems

Find third proportional to 164.48 and 254.70
Half scale
Find third proportional to 657.94 and 1,018.78
Double scale
Find third proportional to 331 and 512
Similar ratio
Find third proportional to 493.45 and 764.09
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.