Home / 279-629.25

Finding the Third Proportional to 279 and 629.25

Calculator

Solution

The third proportional to 279 and 629.25 is: 1,419.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279 : 629.25 = 629.25 : x
  2. Step 2: Convert to fraction form
    279/629.25 = 629.25/x
  3. Step 3: Cross multiply
    279x = 629.25 × 629.25
  4. Step 4: Simplify right side
    279x = 395,955.56
  5. Step 5: Solve for x
    x = 395,955.56/279
  6. Step 6: Final answer
    x = 1,419.20

Related Problems

Find third proportional to 139.50 and 314.63
Half scale
Find third proportional to 558 and 1,258.50
Double scale
Find third proportional to 281 and 634
Similar ratio
Find third proportional to 418.50 and 943.88
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.