Home / 128,079-278,307

Finding the Third Proportional to 128,079 and 278,307

Calculator

Solution

The third proportional to 128,079 and 278,307 is: 604,742.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,079 : 278,307 = 278,307 : x
  2. Step 2: Convert to fraction form
    128,079/278,307 = 278,307/x
  3. Step 3: Cross multiply
    128,079x = 278,307 × 278,307
  4. Step 4: Simplify right side
    128,079x = 77,454,786,249
  5. Step 5: Solve for x
    x = 77,454,786,249/128,079
  6. Step 6: Final answer
    x = 604,742.28

Related Problems

Find third proportional to 64,039.50 and 139,153.50
Half scale
Find third proportional to 256,158 and 556,614
Double scale
Find third proportional to 128,081 and 278,311
Similar ratio
Find third proportional to 192,118.50 and 417,460.50
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.