Home / 119.75-258.56

Finding the Third Proportional to 119.75 and 258.56

Calculator

Solution

The third proportional to 119.75 and 258.56 is: 558.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.75 : 258.56 = 258.56 : x
  2. Step 2: Convert to fraction form
    119.75/258.56 = 258.56/x
  3. Step 3: Cross multiply
    119.75x = 258.56 × 258.56
  4. Step 4: Simplify right side
    119.75x = 66,854.57
  5. Step 5: Solve for x
    x = 66,854.57/119.75
  6. Step 6: Final answer
    x = 558.28

Related Problems

Find third proportional to 59.88 and 129.28
Half scale
Find third proportional to 239.50 and 517.13
Double scale
Find third proportional to 122 and 263
Similar ratio
Find third proportional to 179.63 and 387.84
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.