Home / 128,412-275,940

Finding the Third Proportional to 128,412 and 275,940

Calculator

Solution

The third proportional to 128,412 and 275,940 is: 592,957.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,412 : 275,940 = 275,940 : x
  2. Step 2: Convert to fraction form
    128,412/275,940 = 275,940/x
  3. Step 3: Cross multiply
    128,412x = 275,940 × 275,940
  4. Step 4: Simplify right side
    128,412x = 76,142,883,600
  5. Step 5: Solve for x
    x = 76,142,883,600/128,412
  6. Step 6: Final answer
    x = 592,957.70

Related Problems

Find third proportional to 64,206 and 137,970
Half scale
Find third proportional to 256,824 and 551,880
Double scale
Find third proportional to 128,414 and 275,944
Similar ratio
Find third proportional to 192,618 and 413,910
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.