Home / 321.78-482.74-105.38

Finding the Fourth Proportional to 321.78, 482.74 and 105.38

Calculator

Solution

The fourth proportional to 321.78, 482.74 and 105.38 is: 158.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.78 : 482.74 = 105.38 : x
  2. Step 2: Convert to fraction form
    321.78/482.74 = 105.38/x
  3. Step 3: Cross multiply
    321.78x = 482.74 × 105.38
  4. Step 4: Simplify right side
    321.78x = 50,871.14
  5. Step 5: Solve for x
    x = 50,871.14/321.78
  6. Step 6: Final answer
    x = 158.09

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.