Home / 138,636-298,899

Finding the Third Proportional to 138,636 and 298,899

Calculator

Solution

The third proportional to 138,636 and 298,899 is: 644,425.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,636 : 298,899 = 298,899 : x
  2. Step 2: Convert to fraction form
    138,636/298,899 = 298,899/x
  3. Step 3: Cross multiply
    138,636x = 298,899 × 298,899
  4. Step 4: Simplify right side
    138,636x = 89,340,612,201
  5. Step 5: Solve for x
    x = 89,340,612,201/138,636
  6. Step 6: Final answer
    x = 644,425.78

Related Problems

Find third proportional to 69,318 and 149,449.50
Half scale
Find third proportional to 277,272 and 597,798
Double scale
Find third proportional to 138,638 and 298,903
Similar ratio
Find third proportional to 207,954 and 448,348.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.