Home / 403-605

Finding the Third Proportional to 403 and 605

Calculator

Solution

The third proportional to 403 and 605 is: 908.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    403 : 605 = 605 : x
  2. Step 2: Convert to fraction form
    403/605 = 605/x
  3. Step 3: Cross multiply
    403x = 605 × 605
  4. Step 4: Simplify right side
    403x = 366,025
  5. Step 5: Solve for x
    x = 366,025/403
  6. Step 6: Final answer
    x = 908.25

Related Problems

Find third proportional to 201.50 and 302.50
Half scale
Find third proportional to 806 and 1,210
Double scale
Find third proportional to 405 and 608
Similar ratio
Find third proportional to 604.50 and 907.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.