Home / 224.40-309.42-219.39

Finding the Fourth Proportional to 224.40, 309.42 and 219.39

Calculator

Solution

The fourth proportional to 224.40, 309.42 and 219.39 is: 302.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.40 : 309.42 = 219.39 : x
  2. Step 2: Convert to fraction form
    224.40/309.42 = 219.39/x
  3. Step 3: Cross multiply
    224.40x = 309.42 × 219.39
  4. Step 4: Simplify right side
    224.40x = 67,883.65
  5. Step 5: Solve for x
    x = 67,883.65/224.40
  6. Step 6: Final answer
    x = 302.51

Related Problems

Find fourth proportional to 112.20, 154.71 and 109.70
Half scale
Find fourth proportional to 448.80, 618.84 and 438.78
Double scale
Find fourth proportional to 225.40, 310.80 and 220.39
Similar ratio
Find fourth proportional to 336.60, 464.13 and 329.09
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.