Home / 127.75-257

Finding the Third Proportional to 127.75 and 257

Calculator

Solution

The third proportional to 127.75 and 257 is: 517.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.75 : 257 = 257 : x
  2. Step 2: Convert to fraction form
    127.75/257 = 257/x
  3. Step 3: Cross multiply
    127.75x = 257 × 257
  4. Step 4: Simplify right side
    127.75x = 66,049
  5. Step 5: Solve for x
    x = 66,049/127.75
  6. Step 6: Final answer
    x = 517.02

Related Problems

Find third proportional to 63.88 and 128.50
Half scale
Find third proportional to 255.50 and 514
Double scale
Find third proportional to 130 and 261
Similar ratio
Find third proportional to 191.63 and 385.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.01) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.