Home / 138,948-215,286

Finding the Third Proportional to 138,948 and 215,286

Calculator

Solution

The third proportional to 138,948 and 215,286 is: 333,564.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,948 : 215,286 = 215,286 : x
  2. Step 2: Convert to fraction form
    138,948/215,286 = 215,286/x
  3. Step 3: Cross multiply
    138,948x = 215,286 × 215,286
  4. Step 4: Simplify right side
    138,948x = 46,348,061,796
  5. Step 5: Solve for x
    x = 46,348,061,796/138,948
  6. Step 6: Final answer
    x = 333,564.08

Related Problems

Find third proportional to 69,474 and 107,643
Half scale
Find third proportional to 277,896 and 430,572
Double scale
Find third proportional to 138,950 and 215,289
Similar ratio
Find third proportional to 208,422 and 322,929
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.