Home / 118.13-280.13

Finding the Third Proportional to 118.13 and 280.13

Calculator

Solution

The third proportional to 118.13 and 280.13 is: 664.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.13 : 280.13 = 280.13 : x
  2. Step 2: Convert to fraction form
    118.13/280.13 = 280.13/x
  3. Step 3: Cross multiply
    118.13x = 280.13 × 280.13
  4. Step 4: Simplify right side
    118.13x = 78,470.02
  5. Step 5: Solve for x
    x = 78,470.02/118.13
  6. Step 6: Final answer
    x = 664.30

Related Problems

Find third proportional to 59.06 and 140.06
Half scale
Find third proportional to 236.25 and 560.25
Double scale
Find third proportional to 120 and 285
Similar ratio
Find third proportional to 177.19 and 420.19
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.