Home / 338,908-669,310

Finding the Third Proportional to 338,908 and 669,310

Calculator

Solution

The third proportional to 338,908 and 669,310 is: 1,321,821.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,908 : 669,310 = 669,310 : x
  2. Step 2: Convert to fraction form
    338,908/669,310 = 669,310/x
  3. Step 3: Cross multiply
    338,908x = 669,310 × 669,310
  4. Step 4: Simplify right side
    338,908x = 447,975,876,100
  5. Step 5: Solve for x
    x = 447,975,876,100/338,908
  6. Step 6: Final answer
    x = 1,321,821.49

Related Problems

Find third proportional to 169,454 and 334,655
Half scale
Find third proportional to 677,816 and 1,338,620
Double scale
Find third proportional to 338,910 and 669,314
Similar ratio
Find third proportional to 508,362 and 1,003,965
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.