Home / 309,249-656,406

Finding the Third Proportional to 309,249 and 656,406

Calculator

Solution

The third proportional to 309,249 and 656,406 is: 1,393,274.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,249 : 656,406 = 656,406 : x
  2. Step 2: Convert to fraction form
    309,249/656,406 = 656,406/x
  3. Step 3: Cross multiply
    309,249x = 656,406 × 656,406
  4. Step 4: Simplify right side
    309,249x = 430,868,836,836
  5. Step 5: Solve for x
    x = 430,868,836,836/309,249
  6. Step 6: Final answer
    x = 1,393,274.79

Related Problems

Find third proportional to 154,624.50 and 328,203
Half scale
Find third proportional to 618,498 and 1,312,812
Double scale
Find third proportional to 309,251 and 656,410
Similar ratio
Find third proportional to 463,873.50 and 984,609
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.