Home / 309,880-656,961

Finding the Third Proportional to 309,880 and 656,961

Calculator

Solution

The third proportional to 309,880 and 656,961 is: 1,392,789.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,880 : 656,961 = 656,961 : x
  2. Step 2: Convert to fraction form
    309,880/656,961 = 656,961/x
  3. Step 3: Cross multiply
    309,880x = 656,961 × 656,961
  4. Step 4: Simplify right side
    309,880x = 431,597,755,521
  5. Step 5: Solve for x
    x = 431,597,755,521/309,880
  6. Step 6: Final answer
    x = 1,392,789.97

Related Problems

Find third proportional to 154,940 and 328,480.50
Half scale
Find third proportional to 619,760 and 1,313,922
Double scale
Find third proportional to 309,882 and 656,965
Similar ratio
Find third proportional to 464,820 and 985,441.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.