Home / 299,636-643,739

Finding the Third Proportional to 299,636 and 643,739

Calculator

Solution

The third proportional to 299,636 and 643,739 is: 1,383,011.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,636 : 643,739 = 643,739 : x
  2. Step 2: Convert to fraction form
    299,636/643,739 = 643,739/x
  3. Step 3: Cross multiply
    299,636x = 643,739 × 643,739
  4. Step 4: Simplify right side
    299,636x = 414,399,900,121
  5. Step 5: Solve for x
    x = 414,399,900,121/299,636
  6. Step 6: Final answer
    x = 1,383,011.05

Related Problems

Find third proportional to 149,818 and 321,869.50
Half scale
Find third proportional to 599,272 and 1,287,478
Double scale
Find third proportional to 299,638 and 643,743
Similar ratio
Find third proportional to 449,454 and 965,608.50
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.