Home / 445,456-643,608

Finding the Third Proportional to 445,456 and 643,608

Calculator

Solution

The third proportional to 445,456 and 643,608 is: 929,903.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,456 : 643,608 = 643,608 : x
  2. Step 2: Convert to fraction form
    445,456/643,608 = 643,608/x
  3. Step 3: Cross multiply
    445,456x = 643,608 × 643,608
  4. Step 4: Simplify right side
    445,456x = 414,231,257,664
  5. Step 5: Solve for x
    x = 414,231,257,664/445,456
  6. Step 6: Final answer
    x = 929,903.87

Related Problems

Find third proportional to 222,728 and 321,804
Half scale
Find third proportional to 890,912 and 1,287,216
Double scale
Find third proportional to 445,458 and 643,611
Similar ratio
Find third proportional to 668,184 and 965,412
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.