Home / 3,078.72-4,616.64-1,129.56

Finding the Fourth Proportional to 3,078.72, 4,616.64 and 1,129.56

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Solution

The fourth proportional to 3,078.72, 4,616.64 and 1,129.56 is: 1,693.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.72 : 4,616.64 = 1,129.56 : x
  2. Step 2: Convert to fraction form
    3,078.72/4,616.64 = 1,129.56/x
  3. Step 3: Cross multiply
    3,078.72x = 4,616.64 × 1,129.56
  4. Step 4: Simplify right side
    3,078.72x = 5,214,771.88
  5. Step 5: Solve for x
    x = 5,214,771.88/3,078.72
  6. Step 6: Final answer
    x = 1,693.81

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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.