Home / 419.32-628.14-213.88

Finding the Fourth Proportional to 419.32, 628.14 and 213.88

Calculator

Solution

The fourth proportional to 419.32, 628.14 and 213.88 is: 320.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.32 : 628.14 = 213.88 : x
  2. Step 2: Convert to fraction form
    419.32/628.14 = 213.88/x
  3. Step 3: Cross multiply
    419.32x = 628.14 × 213.88
  4. Step 4: Simplify right side
    419.32x = 134,346.58
  5. Step 5: Solve for x
    x = 134,346.58/419.32
  6. Step 6: Final answer
    x = 320.39

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.