Home / 212.08-318.14-90.24

Finding the Fourth Proportional to 212.08, 318.14 and 90.24

Calculator

Solution

The fourth proportional to 212.08, 318.14 and 90.24 is: 135.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.08 : 318.14 = 90.24 : x
  2. Step 2: Convert to fraction form
    212.08/318.14 = 90.24/x
  3. Step 3: Cross multiply
    212.08x = 318.14 × 90.24
  4. Step 4: Simplify right side
    212.08x = 28,708.95
  5. Step 5: Solve for x
    x = 28,708.95/212.08
  6. Step 6: Final answer
    x = 135.37

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.