Home / 401,936-639,802

Finding the Third Proportional to 401,936 and 639,802

Calculator

Solution

The third proportional to 401,936 and 639,802 is: 1,018,437.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,936 : 639,802 = 639,802 : x
  2. Step 2: Convert to fraction form
    401,936/639,802 = 639,802/x
  3. Step 3: Cross multiply
    401,936x = 639,802 × 639,802
  4. Step 4: Simplify right side
    401,936x = 409,346,599,204
  5. Step 5: Solve for x
    x = 409,346,599,204/401,936
  6. Step 6: Final answer
    x = 1,018,437.26

Related Problems

Find third proportional to 200,968 and 319,901
Half scale
Find third proportional to 803,872 and 1,279,604
Double scale
Find third proportional to 401,938 and 639,805
Similar ratio
Find third proportional to 602,904 and 959,703
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.