Home / 300.50-321

Finding the Third Proportional to 300.50 and 321

Calculator

Solution

The third proportional to 300.50 and 321 is: 342.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.50 : 321 = 321 : x
  2. Step 2: Convert to fraction form
    300.50/321 = 321/x
  3. Step 3: Cross multiply
    300.50x = 321 × 321
  4. Step 4: Simplify right side
    300.50x = 103,041
  5. Step 5: Solve for x
    x = 103,041/300.50
  6. Step 6: Final answer
    x = 342.90

Related Problems

Find third proportional to 150.25 and 160.50
Half scale
Find third proportional to 601 and 642
Double scale
Find third proportional to 303 and 323
Similar ratio
Find third proportional to 450.75 and 481.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.