Home / 394.50-428.25

Finding the Third Proportional to 394.50 and 428.25

Calculator

Solution

The third proportional to 394.50 and 428.25 is: 464.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.50 : 428.25 = 428.25 : x
  2. Step 2: Convert to fraction form
    394.50/428.25 = 428.25/x
  3. Step 3: Cross multiply
    394.50x = 428.25 × 428.25
  4. Step 4: Simplify right side
    394.50x = 183,398.06
  5. Step 5: Solve for x
    x = 183,398.06/394.50
  6. Step 6: Final answer
    x = 464.89

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.