Home / 138,672-308,496

Finding the Third Proportional to 138,672 and 308,496

Calculator

Solution

The third proportional to 138,672 and 308,496 is: 686,294.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,672 : 308,496 = 308,496 : x
  2. Step 2: Convert to fraction form
    138,672/308,496 = 308,496/x
  3. Step 3: Cross multiply
    138,672x = 308,496 × 308,496
  4. Step 4: Simplify right side
    138,672x = 95,169,782,016
  5. Step 5: Solve for x
    x = 95,169,782,016/138,672
  6. Step 6: Final answer
    x = 686,294.15

Related Problems

Find third proportional to 69,336 and 154,248
Half scale
Find third proportional to 277,344 and 616,992
Double scale
Find third proportional to 138,674 and 308,500
Similar ratio
Find third proportional to 208,008 and 462,744
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.