Home / 423,286-639,249

Finding the Third Proportional to 423,286 and 639,249

Calculator

Solution

The third proportional to 423,286 and 639,249 is: 965,397.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,286 : 639,249 = 639,249 : x
  2. Step 2: Convert to fraction form
    423,286/639,249 = 639,249/x
  3. Step 3: Cross multiply
    423,286x = 639,249 × 639,249
  4. Step 4: Simplify right side
    423,286x = 408,639,284,001
  5. Step 5: Solve for x
    x = 408,639,284,001/423,286
  6. Step 6: Final answer
    x = 965,397.59

Related Problems

Find third proportional to 211,643 and 319,624.50
Half scale
Find third proportional to 846,572 and 1,278,498
Double scale
Find third proportional to 423,288 and 639,252
Similar ratio
Find third proportional to 634,929 and 958,873.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.