Home / 3,945-5,445.08-2,289.96

Finding the Fourth Proportional to 3,945, 5,445.08 and 2,289.96

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Solution

The fourth proportional to 3,945, 5,445.08 and 2,289.96 is: 3,160.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945 : 5,445.08 = 2,289.96 : x
  2. Step 2: Convert to fraction form
    3,945/5,445.08 = 2,289.96/x
  3. Step 3: Cross multiply
    3,945x = 5,445.08 × 2,289.96
  4. Step 4: Simplify right side
    3,945x = 12,469,015.40
  5. Step 5: Solve for x
    x = 12,469,015.40/3,945
  6. Step 6: Final answer
    x = 3,160.71

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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.