Home / 108.50-280.75

Finding the Third Proportional to 108.50 and 280.75

Calculator

Solution

The third proportional to 108.50 and 280.75 is: 726.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.50 : 280.75 = 280.75 : x
  2. Step 2: Convert to fraction form
    108.50/280.75 = 280.75/x
  3. Step 3: Cross multiply
    108.50x = 280.75 × 280.75
  4. Step 4: Simplify right side
    108.50x = 78,820.56
  5. Step 5: Solve for x
    x = 78,820.56/108.50
  6. Step 6: Final answer
    x = 726.46

Related Problems

Find third proportional to 54.25 and 140.38
Half scale
Find third proportional to 217 and 561.50
Double scale
Find third proportional to 111 and 286
Similar ratio
Find third proportional to 162.75 and 421.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.