Home / 2,665.85-3,999.11-816.63

Finding the Fourth Proportional to 2,665.85, 3,999.11 and 816.63

Calculator

Solution

The fourth proportional to 2,665.85, 3,999.11 and 816.63 is: 1,225.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,665.85 : 3,999.11 = 816.63 : x
  2. Step 2: Convert to fraction form
    2,665.85/3,999.11 = 816.63/x
  3. Step 3: Cross multiply
    2,665.85x = 3,999.11 × 816.63
  4. Step 4: Simplify right side
    2,665.85x = 3,265,789.12
  5. Step 5: Solve for x
    x = 3,265,789.12/2,665.85
  6. Step 6: Final answer
    x = 1,225.05

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.