Home / 128,628-276,984

Finding the Third Proportional to 128,628 and 276,984

Calculator

Solution

The third proportional to 128,628 and 276,984 is: 596,449.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,628 : 276,984 = 276,984 : x
  2. Step 2: Convert to fraction form
    128,628/276,984 = 276,984/x
  3. Step 3: Cross multiply
    128,628x = 276,984 × 276,984
  4. Step 4: Simplify right side
    128,628x = 76,720,136,256
  5. Step 5: Solve for x
    x = 76,720,136,256/128,628
  6. Step 6: Final answer
    x = 596,449.73

Related Problems

Find third proportional to 64,314 and 138,492
Half scale
Find third proportional to 257,256 and 553,968
Double scale
Find third proportional to 128,630 and 276,988
Similar ratio
Find third proportional to 192,942 and 415,476
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.