Home / 221,139-331,361

Finding the Third Proportional to 221,139 and 331,361

Calculator

Solution

The third proportional to 221,139 and 331,361 is: 496,520.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,139 : 331,361 = 331,361 : x
  2. Step 2: Convert to fraction form
    221,139/331,361 = 331,361/x
  3. Step 3: Cross multiply
    221,139x = 331,361 × 331,361
  4. Step 4: Simplify right side
    221,139x = 109,800,112,321
  5. Step 5: Solve for x
    x = 109,800,112,321/221,139
  6. Step 6: Final answer
    x = 496,520.80

Related Problems

Find third proportional to 110,569.50 and 165,680.50
Half scale
Find third proportional to 442,278 and 662,722
Double scale
Find third proportional to 221,141 and 331,364
Similar ratio
Find third proportional to 331,708.50 and 497,041.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.