Home / 204.39-306.18-108

Finding the Fourth Proportional to 204.39, 306.18 and 108

Calculator

Solution

The fourth proportional to 204.39, 306.18 and 108 is: 161.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.39 : 306.18 = 108 : x
  2. Step 2: Convert to fraction form
    204.39/306.18 = 108/x
  3. Step 3: Cross multiply
    204.39x = 306.18 × 108
  4. Step 4: Simplify right side
    204.39x = 33,067.44
  5. Step 5: Solve for x
    x = 33,067.44/204.39
  6. Step 6: Final answer
    x = 161.79

Related Problems

Find fourth proportional to 102.20, 153.09 and 54
Half scale
Find fourth proportional to 408.78, 612.36 and 216
Double scale
Find fourth proportional to 205.39, 307.68 and 109
Similar ratio
Find fourth proportional to 306.59, 459.27 and 162
1.5x scale

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.