Home / 399.35-551.09-222.30

Finding the Fourth Proportional to 399.35, 551.09 and 222.30

Calculator

Solution

The fourth proportional to 399.35, 551.09 and 222.30 is: 306.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.35 : 551.09 = 222.30 : x
  2. Step 2: Convert to fraction form
    399.35/551.09 = 222.30/x
  3. Step 3: Cross multiply
    399.35x = 551.09 × 222.30
  4. Step 4: Simplify right side
    399.35x = 122,510.13
  5. Step 5: Solve for x
    x = 122,510.13/399.35
  6. Step 6: Final answer
    x = 306.78

Related Problems

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.