Home / 278-371.25

Finding the Third Proportional to 278 and 371.25

Calculator

Solution

The third proportional to 278 and 371.25 is: 495.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    278 : 371.25 = 371.25 : x
  2. Step 2: Convert to fraction form
    278/371.25 = 371.25/x
  3. Step 3: Cross multiply
    278x = 371.25 × 371.25
  4. Step 4: Simplify right side
    278x = 137,826.56
  5. Step 5: Solve for x
    x = 137,826.56/278
  6. Step 6: Final answer
    x = 495.78

Related Problems

Find third proportional to 139 and 185.63
Half scale
Find third proportional to 556 and 742.50
Double scale
Find third proportional to 280 and 374
Similar ratio
Find third proportional to 417 and 556.88
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.