Home / 1,226.20-1,691.48-783.60

Finding the Fourth Proportional to 1,226.20, 1,691.48 and 783.60

Calculator

Solution

The fourth proportional to 1,226.20, 1,691.48 and 783.60 is: 1,080.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.20 : 1,691.48 = 783.60 : x
  2. Step 2: Convert to fraction form
    1,226.20/1,691.48 = 783.60/x
  3. Step 3: Cross multiply
    1,226.20x = 1,691.48 × 783.60
  4. Step 4: Simplify right side
    1,226.20x = 1,325,443.73
  5. Step 5: Solve for x
    x = 1,325,443.73/1,226.20
  6. Step 6: Final answer
    x = 1,080.94

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.