Home / 828.95-1,243.52-281.28

Finding the Fourth Proportional to 828.95, 1,243.52 and 281.28

Calculator

Solution

The fourth proportional to 828.95, 1,243.52 and 281.28 is: 421.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.95 : 1,243.52 = 281.28 : x
  2. Step 2: Convert to fraction form
    828.95/1,243.52 = 281.28/x
  3. Step 3: Cross multiply
    828.95x = 1,243.52 × 281.28
  4. Step 4: Simplify right side
    828.95x = 349,781.62
  5. Step 5: Solve for x
    x = 349,781.62/828.95
  6. Step 6: Final answer
    x = 421.96

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.