Home / 272.11-430.31

Finding the Third Proportional to 272.11 and 430.31

Calculator

Solution

The third proportional to 272.11 and 430.31 is: 680.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.11 : 430.31 = 430.31 : x
  2. Step 2: Convert to fraction form
    272.11/430.31 = 430.31/x
  3. Step 3: Cross multiply
    272.11x = 430.31 × 430.31
  4. Step 4: Simplify right side
    272.11x = 185,168.85
  5. Step 5: Solve for x
    x = 185,168.85/272.11
  6. Step 6: Final answer
    x = 680.49

Related Problems

Find third proportional to 136.05 and 215.16
Half scale
Find third proportional to 544.22 and 860.63
Double scale
Find third proportional to 274 and 433
Similar ratio
Find third proportional to 408.16 and 645.47
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.