Home / 280.88-421.20-118.56

Finding the Fourth Proportional to 280.88, 421.20 and 118.56

Calculator

Solution

The fourth proportional to 280.88, 421.20 and 118.56 is: 177.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.88 : 421.20 = 118.56 : x
  2. Step 2: Convert to fraction form
    280.88/421.20 = 118.56/x
  3. Step 3: Cross multiply
    280.88x = 421.20 × 118.56
  4. Step 4: Simplify right side
    280.88x = 49,937.47
  5. Step 5: Solve for x
    x = 49,937.47/280.88
  6. Step 6: Final answer
    x = 177.79

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.