Home / 203.75-311.25

Finding the Third Proportional to 203.75 and 311.25

Calculator

Solution

The third proportional to 203.75 and 311.25 is: 475.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.75 : 311.25 = 311.25 : x
  2. Step 2: Convert to fraction form
    203.75/311.25 = 311.25/x
  3. Step 3: Cross multiply
    203.75x = 311.25 × 311.25
  4. Step 4: Simplify right side
    203.75x = 96,876.56
  5. Step 5: Solve for x
    x = 96,876.56/203.75
  6. Step 6: Final answer
    x = 475.47

Related Problems

Find third proportional to 101.88 and 155.63
Half scale
Find third proportional to 407.50 and 622.50
Double scale
Find third proportional to 206 and 314
Similar ratio
Find third proportional to 305.63 and 466.88
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.