Home / 378,690-816,429

Finding the Third Proportional to 378,690 and 816,429

Calculator

Solution

The third proportional to 378,690 and 816,429 is: 1,760,163.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,690 : 816,429 = 816,429 : x
  2. Step 2: Convert to fraction form
    378,690/816,429 = 816,429/x
  3. Step 3: Cross multiply
    378,690x = 816,429 × 816,429
  4. Step 4: Simplify right side
    378,690x = 666,556,312,041
  5. Step 5: Solve for x
    x = 666,556,312,041/378,690
  6. Step 6: Final answer
    x = 1,760,163.49

Related Problems

Find third proportional to 189,345 and 408,214.50
Half scale
Find third proportional to 757,380 and 1,632,858
Double scale
Find third proportional to 378,692 and 816,433
Similar ratio
Find third proportional to 568,035 and 1,224,643.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.