Home / 118.13-258.19

Finding the Third Proportional to 118.13 and 258.19

Calculator

Solution

The third proportional to 118.13 and 258.19 is: 564.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.13 : 258.19 = 258.19 : x
  2. Step 2: Convert to fraction form
    118.13/258.19 = 258.19/x
  3. Step 3: Cross multiply
    118.13x = 258.19 × 258.19
  4. Step 4: Simplify right side
    118.13x = 66,660.79
  5. Step 5: Solve for x
    x = 66,660.79/118.13
  6. Step 6: Final answer
    x = 564.32

Related Problems

Find third proportional to 59.06 and 129.09
Half scale
Find third proportional to 236.25 and 516.38
Double scale
Find third proportional to 120 and 263
Similar ratio
Find third proportional to 177.19 and 387.28
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.