Home / 216,312-289,350

Finding the Third Proportional to 216,312 and 289,350

Calculator

Solution

The third proportional to 216,312 and 289,350 is: 387,049.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,312 : 289,350 = 289,350 : x
  2. Step 2: Convert to fraction form
    216,312/289,350 = 289,350/x
  3. Step 3: Cross multiply
    216,312x = 289,350 × 289,350
  4. Step 4: Simplify right side
    216,312x = 83,723,422,500
  5. Step 5: Solve for x
    x = 83,723,422,500/216,312
  6. Step 6: Final answer
    x = 387,049.37

Related Problems

Find third proportional to 108,156 and 144,675
Half scale
Find third proportional to 432,624 and 578,700
Double scale
Find third proportional to 216,314 and 289,353
Similar ratio
Find third proportional to 324,468 and 434,025
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.