Home / 128,212-279,752

Finding the Third Proportional to 128,212 and 279,752

Calculator

Solution

The third proportional to 128,212 and 279,752 is: 610,404.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,212 : 279,752 = 279,752 : x
  2. Step 2: Convert to fraction form
    128,212/279,752 = 279,752/x
  3. Step 3: Cross multiply
    128,212x = 279,752 × 279,752
  4. Step 4: Simplify right side
    128,212x = 78,261,181,504
  5. Step 5: Solve for x
    x = 78,261,181,504/128,212
  6. Step 6: Final answer
    x = 610,404.50

Related Problems

Find third proportional to 64,106 and 139,876
Half scale
Find third proportional to 256,424 and 559,504
Double scale
Find third proportional to 128,214 and 279,756
Similar ratio
Find third proportional to 192,318 and 419,628
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.