Home / 128,559-263,382

Finding the Third Proportional to 128,559 and 263,382

Calculator

Solution

The third proportional to 128,559 and 263,382 is: 539,597.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,559 : 263,382 = 263,382 : x
  2. Step 2: Convert to fraction form
    128,559/263,382 = 263,382/x
  3. Step 3: Cross multiply
    128,559x = 263,382 × 263,382
  4. Step 4: Simplify right side
    128,559x = 69,370,077,924
  5. Step 5: Solve for x
    x = 69,370,077,924/128,559
  6. Step 6: Final answer
    x = 539,597.21

Related Problems

Find third proportional to 64,279.50 and 131,691
Half scale
Find third proportional to 257,118 and 526,764
Double scale
Find third proportional to 128,561 and 263,386
Similar ratio
Find third proportional to 192,838.50 and 395,073
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.