Home / 213.13-319.65-91.43

Finding the Fourth Proportional to 213.13, 319.65 and 91.43

Calculator

Solution

The fourth proportional to 213.13, 319.65 and 91.43 is: 137.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.13 : 319.65 = 91.43 : x
  2. Step 2: Convert to fraction form
    213.13/319.65 = 91.43/x
  3. Step 3: Cross multiply
    213.13x = 319.65 × 91.43
  4. Step 4: Simplify right side
    213.13x = 29,224.86
  5. Step 5: Solve for x
    x = 29,224.86/213.13
  6. Step 6: Final answer
    x = 137.12

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.