Home / 213.68-320.54-122.40

Finding the Fourth Proportional to 213.68, 320.54 and 122.40

Calculator

Solution

The fourth proportional to 213.68, 320.54 and 122.40 is: 183.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.68 : 320.54 = 122.40 : x
  2. Step 2: Convert to fraction form
    213.68/320.54 = 122.40/x
  3. Step 3: Cross multiply
    213.68x = 320.54 × 122.40
  4. Step 4: Simplify right side
    213.68x = 39,233.48
  5. Step 5: Solve for x
    x = 39,233.48/213.68
  6. Step 6: Final answer
    x = 183.61

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.