Home / 518-628

Finding the Third Proportional to 518 and 628

Calculator

Solution

The third proportional to 518 and 628 is: 761.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    518 : 628 = 628 : x
  2. Step 2: Convert to fraction form
    518/628 = 628/x
  3. Step 3: Cross multiply
    518x = 628 × 628
  4. Step 4: Simplify right side
    518x = 394,384
  5. Step 5: Solve for x
    x = 394,384/518
  6. Step 6: Final answer
    x = 761.36

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.