Home / 340.80-511.61-219.30

Finding the Fourth Proportional to 340.80, 511.61 and 219.30

Calculator

Solution

The fourth proportional to 340.80, 511.61 and 219.30 is: 329.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.80 : 511.61 = 219.30 : x
  2. Step 2: Convert to fraction form
    340.80/511.61 = 219.30/x
  3. Step 3: Cross multiply
    340.80x = 511.61 × 219.30
  4. Step 4: Simplify right side
    340.80x = 112,194.98
  5. Step 5: Solve for x
    x = 112,194.98/340.80
  6. Step 6: Final answer
    x = 329.21

Related Problems

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.