Home / 663.66-996.21-279.18

Finding the Fourth Proportional to 663.66, 996.21 and 279.18

Calculator

Solution

The fourth proportional to 663.66, 996.21 and 279.18 is: 419.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.66 : 996.21 = 279.18 : x
  2. Step 2: Convert to fraction form
    663.66/996.21 = 279.18/x
  3. Step 3: Cross multiply
    663.66x = 996.21 × 279.18
  4. Step 4: Simplify right side
    663.66x = 278,121.91
  5. Step 5: Solve for x
    x = 278,121.91/663.66
  6. Step 6: Final answer
    x = 419.07

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.