Home / 279-423.25

Finding the Third Proportional to 279 and 423.25

Calculator

Solution

The third proportional to 279 and 423.25 is: 642.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    279 : 423.25 = 423.25 : x
  2. Step 2: Convert to fraction form
    279/423.25 = 423.25/x
  3. Step 3: Cross multiply
    279x = 423.25 × 423.25
  4. Step 4: Simplify right side
    279x = 179,140.56
  5. Step 5: Solve for x
    x = 179,140.56/279
  6. Step 6: Final answer
    x = 642.08

Related Problems

Find third proportional to 139.50 and 211.63
Half scale
Find third proportional to 558 and 846.50
Double scale
Find third proportional to 281 and 426
Similar ratio
Find third proportional to 418.50 and 634.88
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.