Home / 274.17-411.21-81.75

Finding the Fourth Proportional to 274.17, 411.21 and 81.75

Calculator

Solution

The fourth proportional to 274.17, 411.21 and 81.75 is: 122.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.17 : 411.21 = 81.75 : x
  2. Step 2: Convert to fraction form
    274.17/411.21 = 81.75/x
  3. Step 3: Cross multiply
    274.17x = 411.21 × 81.75
  4. Step 4: Simplify right side
    274.17x = 33,616.42
  5. Step 5: Solve for x
    x = 33,616.42/274.17
  6. Step 6: Final answer
    x = 122.61

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.