Home / 685.50-1,028.07-198.54

Finding the Fourth Proportional to 685.50, 1,028.07 and 198.54

Calculator

Solution

The fourth proportional to 685.50, 1,028.07 and 198.54 is: 297.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.50 : 1,028.07 = 198.54 : x
  2. Step 2: Convert to fraction form
    685.50/1,028.07 = 198.54/x
  3. Step 3: Cross multiply
    685.50x = 1,028.07 × 198.54
  4. Step 4: Simplify right side
    685.50x = 204,113.02
  5. Step 5: Solve for x
    x = 204,113.02/685.50
  6. Step 6: Final answer
    x = 297.76

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.