Home / 488-649

Finding the Third Proportional to 488 and 649

Calculator

Solution

The third proportional to 488 and 649 is: 863.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    488 : 649 = 649 : x
  2. Step 2: Convert to fraction form
    488/649 = 649/x
  3. Step 3: Cross multiply
    488x = 649 × 649
  4. Step 4: Simplify right side
    488x = 421,201
  5. Step 5: Solve for x
    x = 421,201/488
  6. Step 6: Final answer
    x = 863.12

Related Problems

Find third proportional to 244 and 324.50
Half scale
Find third proportional to 976 and 1,298
Double scale
Find third proportional to 490 and 652
Similar ratio
Find third proportional to 732 and 973.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.