Home / 128,486-204,609

Finding the Third Proportional to 128,486 and 204,609

Calculator

Solution

The third proportional to 128,486 and 204,609 is: 325,831.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,486 : 204,609 = 204,609 : x
  2. Step 2: Convert to fraction form
    128,486/204,609 = 204,609/x
  3. Step 3: Cross multiply
    128,486x = 204,609 × 204,609
  4. Step 4: Simplify right side
    128,486x = 41,864,842,881
  5. Step 5: Solve for x
    x = 41,864,842,881/128,486
  6. Step 6: Final answer
    x = 325,831.94

Related Problems

Find third proportional to 64,243 and 102,304.50
Half scale
Find third proportional to 256,972 and 409,218
Double scale
Find third proportional to 128,488 and 204,612
Similar ratio
Find third proportional to 192,729 and 306,913.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.