Home / 297,872-642,400

Finding the Third Proportional to 297,872 and 642,400

Calculator

Solution

The third proportional to 297,872 and 642,400 is: 1,385,419.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,872 : 642,400 = 642,400 : x
  2. Step 2: Convert to fraction form
    297,872/642,400 = 642,400/x
  3. Step 3: Cross multiply
    297,872x = 642,400 × 642,400
  4. Step 4: Simplify right side
    297,872x = 412,677,760,000
  5. Step 5: Solve for x
    x = 412,677,760,000/297,872
  6. Step 6: Final answer
    x = 1,385,419.78

Related Problems

Find third proportional to 148,936 and 321,200
Half scale
Find third proportional to 595,744 and 1,284,800
Double scale
Find third proportional to 297,874 and 642,404
Similar ratio
Find third proportional to 446,808 and 963,600
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.