Home / 321.58-482.60-139.11

Finding the Fourth Proportional to 321.58, 482.60 and 139.11

Calculator

Solution

The fourth proportional to 321.58, 482.60 and 139.11 is: 208.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.58 : 482.60 = 139.11 : x
  2. Step 2: Convert to fraction form
    321.58/482.60 = 139.11/x
  3. Step 3: Cross multiply
    321.58x = 482.60 × 139.11
  4. Step 4: Simplify right side
    321.58x = 67,133.02
  5. Step 5: Solve for x
    x = 67,133.02/321.58
  6. Step 6: Final answer
    x = 208.76

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.