Home / 218-327-89.75

Finding the Fourth Proportional to 218, 327 and 89.75

Calculator

Solution

The fourth proportional to 218, 327 and 89.75 is: 134.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    218 : 327 = 89.75 : x
  2. Step 2: Convert to fraction form
    218/327 = 89.75/x
  3. Step 3: Cross multiply
    218x = 327 × 89.75
  4. Step 4: Simplify right side
    218x = 29,348.25
  5. Step 5: Solve for x
    x = 29,348.25/218
  6. Step 6: Final answer
    x = 134.63

Related Problems

Find fourth proportional to 109, 163.50 and 44.88
Half scale
Find fourth proportional to 436, 654 and 179.50
Double scale
Find fourth proportional to 219, 328.50 and 90.75
Similar ratio
Find fourth proportional to 327, 490.50 and 134.63
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.