Home / 214-321.12-100

Finding the Fourth Proportional to 214, 321.12 and 100

Calculator

Solution

The fourth proportional to 214, 321.12 and 100 is: 150.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    214 : 321.12 = 100 : x
  2. Step 2: Convert to fraction form
    214/321.12 = 100/x
  3. Step 3: Cross multiply
    214x = 321.12 × 100
  4. Step 4: Simplify right side
    214x = 32,112
  5. Step 5: Solve for x
    x = 32,112/214
  6. Step 6: Final answer
    x = 150.06

Related Problems

Find fourth proportional to 107, 160.56 and 50
Half scale
Find fourth proportional to 428, 642.24 and 200
Double scale
Find fourth proportional to 215, 322.62 and 101
Similar ratio
Find fourth proportional to 321, 481.68 and 150
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.