Home / 367.20-506.72-219.80

Finding the Fourth Proportional to 367.20, 506.72 and 219.80

Calculator

Solution

The fourth proportional to 367.20, 506.72 and 219.80 is: 303.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.20 : 506.72 = 219.80 : x
  2. Step 2: Convert to fraction form
    367.20/506.72 = 219.80/x
  3. Step 3: Cross multiply
    367.20x = 506.72 × 219.80
  4. Step 4: Simplify right side
    367.20x = 111,377.06
  5. Step 5: Solve for x
    x = 111,377.06/367.20
  6. Step 6: Final answer
    x = 303.31

Related Problems

Find fourth proportional to 183.60, 253.36 and 109.90
Half scale
Find fourth proportional to 734.40, 1,013.44 and 439.60
Double scale
Find fourth proportional to 368.20, 508.10 and 220.80
Similar ratio
Find fourth proportional to 550.80, 760.08 and 329.70
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.