Home / 420,977-641,973

Finding the Third Proportional to 420,977 and 641,973

Calculator

Solution

The third proportional to 420,977 and 641,973 is: 978,983.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,977 : 641,973 = 641,973 : x
  2. Step 2: Convert to fraction form
    420,977/641,973 = 641,973/x
  3. Step 3: Cross multiply
    420,977x = 641,973 × 641,973
  4. Step 4: Simplify right side
    420,977x = 412,129,332,729
  5. Step 5: Solve for x
    x = 412,129,332,729/420,977
  6. Step 6: Final answer
    x = 978,983.02

Related Problems

Find third proportional to 210,488.50 and 320,986.50
Half scale
Find third proportional to 841,954 and 1,283,946
Double scale
Find third proportional to 420,979 and 641,976
Similar ratio
Find third proportional to 631,465.50 and 962,959.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.