Home / 291,474-428,876

Finding the Third Proportional to 291,474 and 428,876

Calculator

Solution

The third proportional to 291,474 and 428,876 is: 631,049.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,474 : 428,876 = 428,876 : x
  2. Step 2: Convert to fraction form
    291,474/428,876 = 428,876/x
  3. Step 3: Cross multiply
    291,474x = 428,876 × 428,876
  4. Step 4: Simplify right side
    291,474x = 183,934,623,376
  5. Step 5: Solve for x
    x = 183,934,623,376/291,474
  6. Step 6: Final answer
    x = 631,049.85

Related Problems

Find third proportional to 145,737 and 214,438
Half scale
Find third proportional to 582,948 and 857,752
Double scale
Find third proportional to 291,476 and 428,879
Similar ratio
Find third proportional to 437,211 and 643,314
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.