Home / 138,458-207,456

Finding the Third Proportional to 138,458 and 207,456

Calculator

Solution

The third proportional to 138,458 and 207,456 is: 310,837.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,458 : 207,456 = 207,456 : x
  2. Step 2: Convert to fraction form
    138,458/207,456 = 207,456/x
  3. Step 3: Cross multiply
    138,458x = 207,456 × 207,456
  4. Step 4: Simplify right side
    138,458x = 43,037,991,936
  5. Step 5: Solve for x
    x = 43,037,991,936/138,458
  6. Step 6: Final answer
    x = 310,837.89

Related Problems

Find third proportional to 69,229 and 103,728
Half scale
Find third proportional to 276,916 and 414,912
Double scale
Find third proportional to 138,460 and 207,459
Similar ratio
Find third proportional to 207,687 and 311,184
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.