Home / 243,193-388,507

Finding the Third Proportional to 243,193 and 388,507

Calculator

Solution

The third proportional to 243,193 and 388,507 is: 620,649.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,193 : 388,507 = 388,507 : x
  2. Step 2: Convert to fraction form
    243,193/388,507 = 388,507/x
  3. Step 3: Cross multiply
    243,193x = 388,507 × 388,507
  4. Step 4: Simplify right side
    243,193x = 150,937,689,049
  5. Step 5: Solve for x
    x = 150,937,689,049/243,193
  6. Step 6: Final answer
    x = 620,649.81

Related Problems

Find third proportional to 121,596.50 and 194,253.50
Half scale
Find third proportional to 486,386 and 777,014
Double scale
Find third proportional to 243,195 and 388,510
Similar ratio
Find third proportional to 364,789.50 and 582,760.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.