Home / 129,128-279,702

Finding the Third Proportional to 129,128 and 279,702

Calculator

Solution

The third proportional to 129,128 and 279,702 is: 605,857.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,128 : 279,702 = 279,702 : x
  2. Step 2: Convert to fraction form
    129,128/279,702 = 279,702/x
  3. Step 3: Cross multiply
    129,128x = 279,702 × 279,702
  4. Step 4: Simplify right side
    129,128x = 78,233,208,804
  5. Step 5: Solve for x
    x = 78,233,208,804/129,128
  6. Step 6: Final answer
    x = 605,857.82

Related Problems

Find third proportional to 64,564 and 139,851
Half scale
Find third proportional to 258,256 and 559,404
Double scale
Find third proportional to 129,130 and 279,706
Similar ratio
Find third proportional to 193,692 and 419,553
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.