Home / 392-658

Finding the Third Proportional to 392 and 658

Calculator

Solution

The third proportional to 392 and 658 is: 1,104.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    392 : 658 = 658 : x
  2. Step 2: Convert to fraction form
    392/658 = 658/x
  3. Step 3: Cross multiply
    392x = 658 × 658
  4. Step 4: Simplify right side
    392x = 432,964
  5. Step 5: Solve for x
    x = 432,964/392
  6. Step 6: Final answer
    x = 1,104.50

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.68) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.