Home / 287.57-396.83-163.21

Finding the Fourth Proportional to 287.57, 396.83 and 163.21

Calculator

Solution

The fourth proportional to 287.57, 396.83 and 163.21 is: 225.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.57 : 396.83 = 163.21 : x
  2. Step 2: Convert to fraction form
    287.57/396.83 = 163.21/x
  3. Step 3: Cross multiply
    287.57x = 396.83 × 163.21
  4. Step 4: Simplify right side
    287.57x = 64,768.18
  5. Step 5: Solve for x
    x = 64,768.18/287.57
  6. Step 6: Final answer
    x = 225.23

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.