Home / 118-258

Finding the Third Proportional to 118 and 258

Calculator

Solution

The third proportional to 118 and 258 is: 564.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    118 : 258 = 258 : x
  2. Step 2: Convert to fraction form
    118/258 = 258/x
  3. Step 3: Cross multiply
    118x = 258 × 258
  4. Step 4: Simplify right side
    118x = 66,564
  5. Step 5: Solve for x
    x = 66,564/118
  6. Step 6: Final answer
    x = 564.10

Related Problems

Find third proportional to 59 and 129
Half scale
Find third proportional to 236 and 516
Double scale
Find third proportional to 120 and 262
Similar ratio
Find third proportional to 177 and 387
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.