Home / 311,120-642,976

Finding the Third Proportional to 311,120 and 642,976

Calculator

Solution

The third proportional to 311,120 and 642,976 is: 1,328,806.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,120 : 642,976 = 642,976 : x
  2. Step 2: Convert to fraction form
    311,120/642,976 = 642,976/x
  3. Step 3: Cross multiply
    311,120x = 642,976 × 642,976
  4. Step 4: Simplify right side
    311,120x = 413,418,136,576
  5. Step 5: Solve for x
    x = 413,418,136,576/311,120
  6. Step 6: Final answer
    x = 1,328,806.04

Related Problems

Find third proportional to 155,560 and 321,488
Half scale
Find third proportional to 622,240 and 1,285,952
Double scale
Find third proportional to 311,122 and 642,980
Similar ratio
Find third proportional to 466,680 and 964,464
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.