Home / 255.88-396.88

Finding the Third Proportional to 255.88 and 396.88

Calculator

Solution

The third proportional to 255.88 and 396.88 is: 615.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.88 : 396.88 = 396.88 : x
  2. Step 2: Convert to fraction form
    255.88/396.88 = 396.88/x
  3. Step 3: Cross multiply
    255.88x = 396.88 × 396.88
  4. Step 4: Simplify right side
    255.88x = 157,509.77
  5. Step 5: Solve for x
    x = 157,509.77/255.88
  6. Step 6: Final answer
    x = 615.57

Related Problems

Find third proportional to 127.94 and 198.44
Half scale
Find third proportional to 511.75 and 793.75
Double scale
Find third proportional to 258 and 400
Similar ratio
Find third proportional to 383.81 and 595.31
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.