Home / 390.13-538.30-224.25

Finding the Fourth Proportional to 390.13, 538.30 and 224.25

Calculator

Solution

The fourth proportional to 390.13, 538.30 and 224.25 is: 309.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.13 : 538.30 = 224.25 : x
  2. Step 2: Convert to fraction form
    390.13/538.30 = 224.25/x
  3. Step 3: Cross multiply
    390.13x = 538.30 × 224.25
  4. Step 4: Simplify right side
    390.13x = 120,713.80
  5. Step 5: Solve for x
    x = 120,713.80/390.13
  6. Step 6: Final answer
    x = 309.42

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.