Home / 126.84-280.13

Finding the Third Proportional to 126.84 and 280.13

Calculator

Solution

The third proportional to 126.84 and 280.13 is: 618.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.84 : 280.13 = 280.13 : x
  2. Step 2: Convert to fraction form
    126.84/280.13 = 280.13/x
  3. Step 3: Cross multiply
    126.84x = 280.13 × 280.13
  4. Step 4: Simplify right side
    126.84x = 78,470.02
  5. Step 5: Solve for x
    x = 78,470.02/126.84
  6. Step 6: Final answer
    x = 618.64

Related Problems

Find third proportional to 63.42 and 140.06
Half scale
Find third proportional to 253.69 and 560.25
Double scale
Find third proportional to 129 and 285
Similar ratio
Find third proportional to 190.27 and 420.19
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.