Home / 212,379-321,289

Finding the Third Proportional to 212,379 and 321,289

Calculator

Solution

The third proportional to 212,379 and 321,289 is: 486,049.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,379 : 321,289 = 321,289 : x
  2. Step 2: Convert to fraction form
    212,379/321,289 = 321,289/x
  3. Step 3: Cross multiply
    212,379x = 321,289 × 321,289
  4. Step 4: Simplify right side
    212,379x = 103,226,621,521
  5. Step 5: Solve for x
    x = 103,226,621,521/212,379
  6. Step 6: Final answer
    x = 486,049.10

Related Problems

Find third proportional to 106,189.50 and 160,644.50
Half scale
Find third proportional to 424,758 and 642,578
Double scale
Find third proportional to 212,381 and 321,292
Similar ratio
Find third proportional to 318,568.50 and 481,933.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.