Home / 299,662-643,792

Finding the Third Proportional to 299,662 and 643,792

Calculator

Solution

The third proportional to 299,662 and 643,792 is: 1,383,118.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,662 : 643,792 = 643,792 : x
  2. Step 2: Convert to fraction form
    299,662/643,792 = 643,792/x
  3. Step 3: Cross multiply
    299,662x = 643,792 × 643,792
  4. Step 4: Simplify right side
    299,662x = 414,468,139,264
  5. Step 5: Solve for x
    x = 414,468,139,264/299,662
  6. Step 6: Final answer
    x = 1,383,118.78

Related Problems

Find third proportional to 149,831 and 321,896
Half scale
Find third proportional to 599,324 and 1,287,584
Double scale
Find third proportional to 299,664 and 643,796
Similar ratio
Find third proportional to 449,493 and 965,688
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.