Home / 311.08-466.66-128.56

Finding the Fourth Proportional to 311.08, 466.66 and 128.56

Calculator

Solution

The fourth proportional to 311.08, 466.66 and 128.56 is: 192.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.08 : 466.66 = 128.56 : x
  2. Step 2: Convert to fraction form
    311.08/466.66 = 128.56/x
  3. Step 3: Cross multiply
    311.08x = 466.66 × 128.56
  4. Step 4: Simplify right side
    311.08x = 59,993.81
  5. Step 5: Solve for x
    x = 59,993.81/311.08
  6. Step 6: Final answer
    x = 192.86

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.