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Finding the Fourth Proportional to 2,879.16, 3,978 and 2,294.16

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Solution

The fourth proportional to 2,879.16, 3,978 and 2,294.16 is: 3,169.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.16 : 3,978 = 2,294.16 : x
  2. Step 2: Convert to fraction form
    2,879.16/3,978 = 2,294.16/x
  3. Step 3: Cross multiply
    2,879.16x = 3,978 × 2,294.16
  4. Step 4: Simplify right side
    2,879.16x = 9,126,168.48
  5. Step 5: Solve for x
    x = 9,126,168.48/2,879.16
  6. Step 6: Final answer
    x = 3,169.73

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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.