Home / 300-450-171.78

Finding the Fourth Proportional to 300, 450 and 171.78

Calculator

Solution

The fourth proportional to 300, 450 and 171.78 is: 257.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    300 : 450 = 171.78 : x
  2. Step 2: Convert to fraction form
    300/450 = 171.78/x
  3. Step 3: Cross multiply
    300x = 450 × 171.78
  4. Step 4: Simplify right side
    300x = 77,301
  5. Step 5: Solve for x
    x = 77,301/300
  6. Step 6: Final answer
    x = 257.67

Related Problems

Find fourth proportional to 150, 225 and 85.89
Half scale
Find fourth proportional to 600, 900 and 343.56
Double scale
Find fourth proportional to 301, 451.50 and 172.78
Similar ratio
Find fourth proportional to 450, 675 and 257.67
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.