Home / 138,628-299,126

Finding the Third Proportional to 138,628 and 299,126

Calculator

Solution

The third proportional to 138,628 and 299,126 is: 645,442.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,628 : 299,126 = 299,126 : x
  2. Step 2: Convert to fraction form
    138,628/299,126 = 299,126/x
  3. Step 3: Cross multiply
    138,628x = 299,126 × 299,126
  4. Step 4: Simplify right side
    138,628x = 89,476,363,876
  5. Step 5: Solve for x
    x = 89,476,363,876/138,628
  6. Step 6: Final answer
    x = 645,442.22

Related Problems

Find third proportional to 69,314 and 149,563
Half scale
Find third proportional to 277,256 and 598,252
Double scale
Find third proportional to 138,630 and 299,130
Similar ratio
Find third proportional to 207,942 and 448,689
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.