Home / 215,136-321,246

Finding the Third Proportional to 215,136 and 321,246

Calculator

Solution

The third proportional to 215,136 and 321,246 is: 479,691.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,136 : 321,246 = 321,246 : x
  2. Step 2: Convert to fraction form
    215,136/321,246 = 321,246/x
  3. Step 3: Cross multiply
    215,136x = 321,246 × 321,246
  4. Step 4: Simplify right side
    215,136x = 103,198,992,516
  5. Step 5: Solve for x
    x = 103,198,992,516/215,136
  6. Step 6: Final answer
    x = 479,691.88

Related Problems

Find third proportional to 107,568 and 160,623
Half scale
Find third proportional to 430,272 and 642,492
Double scale
Find third proportional to 215,138 and 321,249
Similar ratio
Find third proportional to 322,704 and 481,869
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.