Home / 401,939-639,810

Finding the Third Proportional to 401,939 and 639,810

Calculator

Solution

The third proportional to 401,939 and 639,810 is: 1,018,455.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,939 : 639,810 = 639,810 : x
  2. Step 2: Convert to fraction form
    401,939/639,810 = 639,810/x
  3. Step 3: Cross multiply
    401,939x = 639,810 × 639,810
  4. Step 4: Simplify right side
    401,939x = 409,356,836,100
  5. Step 5: Solve for x
    x = 409,356,836,100/401,939
  6. Step 6: Final answer
    x = 1,018,455.13

Related Problems

Find third proportional to 200,969.50 and 319,905
Half scale
Find third proportional to 803,878 and 1,279,620
Double scale
Find third proportional to 401,941 and 639,813
Similar ratio
Find third proportional to 602,908.50 and 959,715
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.