Home / 299,378-643,108

Finding the Third Proportional to 299,378 and 643,108

Calculator

Solution

The third proportional to 299,378 and 643,108 is: 1,381,490.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,378 : 643,108 = 643,108 : x
  2. Step 2: Convert to fraction form
    299,378/643,108 = 643,108/x
  3. Step 3: Cross multiply
    299,378x = 643,108 × 643,108
  4. Step 4: Simplify right side
    299,378x = 413,587,899,664
  5. Step 5: Solve for x
    x = 413,587,899,664/299,378
  6. Step 6: Final answer
    x = 1,381,490.62

Related Problems

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.