Home / 128,348-198,356

Finding the Third Proportional to 128,348 and 198,356

Calculator

Solution

The third proportional to 128,348 and 198,356 is: 306,550.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,348 : 198,356 = 198,356 : x
  2. Step 2: Convert to fraction form
    128,348/198,356 = 198,356/x
  3. Step 3: Cross multiply
    128,348x = 198,356 × 198,356
  4. Step 4: Simplify right side
    128,348x = 39,345,102,736
  5. Step 5: Solve for x
    x = 39,345,102,736/128,348
  6. Step 6: Final answer
    x = 306,550.18

Related Problems

Find third proportional to 64,174 and 99,178
Half scale
Find third proportional to 256,696 and 396,712
Double scale
Find third proportional to 128,350 and 198,359
Similar ratio
Find third proportional to 192,522 and 297,534
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.