Home / 128,772-285,192

Finding the Third Proportional to 128,772 and 285,192

Calculator

Solution

The third proportional to 128,772 and 285,192 is: 631,616.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,772 : 285,192 = 285,192 : x
  2. Step 2: Convert to fraction form
    128,772/285,192 = 285,192/x
  3. Step 3: Cross multiply
    128,772x = 285,192 × 285,192
  4. Step 4: Simplify right side
    128,772x = 81,334,476,864
  5. Step 5: Solve for x
    x = 81,334,476,864/128,772
  6. Step 6: Final answer
    x = 631,616.17

Related Problems

Find third proportional to 64,386 and 142,596
Half scale
Find third proportional to 257,544 and 570,384
Double scale
Find third proportional to 128,774 and 285,196
Similar ratio
Find third proportional to 193,158 and 427,788
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.