Home / 231,369-315,195

Finding the Third Proportional to 231,369 and 315,195

Calculator

Solution

The third proportional to 231,369 and 315,195 is: 429,391.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,369 : 315,195 = 315,195 : x
  2. Step 2: Convert to fraction form
    231,369/315,195 = 315,195/x
  3. Step 3: Cross multiply
    231,369x = 315,195 × 315,195
  4. Step 4: Simplify right side
    231,369x = 99,347,888,025
  5. Step 5: Solve for x
    x = 99,347,888,025/231,369
  6. Step 6: Final answer
    x = 429,391.53

Related Problems

Find third proportional to 115,684.50 and 157,597.50
Half scale
Find third proportional to 462,738 and 630,390
Double scale
Find third proportional to 231,371 and 315,198
Similar ratio
Find third proportional to 347,053.50 and 472,792.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.