Home / 212.53-318.89-90.82

Finding the Fourth Proportional to 212.53, 318.89 and 90.82

Calculator

Solution

The fourth proportional to 212.53, 318.89 and 90.82 is: 136.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.53 : 318.89 = 90.82 : x
  2. Step 2: Convert to fraction form
    212.53/318.89 = 90.82/x
  3. Step 3: Cross multiply
    212.53x = 318.89 × 90.82
  4. Step 4: Simplify right side
    212.53x = 28,961.59
  5. Step 5: Solve for x
    x = 28,961.59/212.53
  6. Step 6: Final answer
    x = 136.27

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.