Home / 401.25-636

Finding the Third Proportional to 401.25 and 636

Calculator

Solution

The third proportional to 401.25 and 636 is: 1,008.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.25 : 636 = 636 : x
  2. Step 2: Convert to fraction form
    401.25/636 = 636/x
  3. Step 3: Cross multiply
    401.25x = 636 × 636
  4. Step 4: Simplify right side
    401.25x = 404,496
  5. Step 5: Solve for x
    x = 404,496/401.25
  6. Step 6: Final answer
    x = 1,008.09

Related Problems

Find third proportional to 200.63 and 318
Half scale
Find third proportional to 802.50 and 1,272
Double scale
Find third proportional to 403 and 639
Similar ratio
Find third proportional to 601.88 and 954
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.