Home / 216.38-324.30-144.02

Finding the Fourth Proportional to 216.38, 324.30 and 144.02

Calculator

Solution

The fourth proportional to 216.38, 324.30 and 144.02 is: 215.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.38 : 324.30 = 144.02 : x
  2. Step 2: Convert to fraction form
    216.38/324.30 = 144.02/x
  3. Step 3: Cross multiply
    216.38x = 324.30 × 144.02
  4. Step 4: Simplify right side
    216.38x = 46,705.69
  5. Step 5: Solve for x
    x = 46,705.69/216.38
  6. Step 6: Final answer
    x = 215.85

Related Problems

Find fourth proportional to 108.19, 162.15 and 72.01
Half scale
Find fourth proportional to 432.76, 648.60 and 288.04
Double scale
Find fourth proportional to 217.38, 325.80 and 145.02
Similar ratio
Find fourth proportional to 324.57, 486.45 and 216.03
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.