Home / 280.71-421.43-194.61

Finding the Fourth Proportional to 280.71, 421.43 and 194.61

Calculator

Solution

The fourth proportional to 280.71, 421.43 and 194.61 is: 292.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.71 : 421.43 = 194.61 : x
  2. Step 2: Convert to fraction form
    280.71/421.43 = 194.61/x
  3. Step 3: Cross multiply
    280.71x = 421.43 × 194.61
  4. Step 4: Simplify right side
    280.71x = 82,013.52
  5. Step 5: Solve for x
    x = 82,013.52/280.71
  6. Step 6: Final answer
    x = 292.16

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.