Home / 539-641

Finding the Third Proportional to 539 and 641

Calculator

Solution

The third proportional to 539 and 641 is: 762.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539 : 641 = 641 : x
  2. Step 2: Convert to fraction form
    539/641 = 641/x
  3. Step 3: Cross multiply
    539x = 641 × 641
  4. Step 4: Simplify right side
    539x = 410,881
  5. Step 5: Solve for x
    x = 410,881/539
  6. Step 6: Final answer
    x = 762.30

Related Problems

Find third proportional to 269.50 and 320.50
Half scale
Find third proportional to 1,078 and 1,282
Double scale
Find third proportional to 541 and 643
Similar ratio
Find third proportional to 808.50 and 961.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.