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Finding the Fourth Proportional to 3,550.64, 4,899.89 and 1,978.79

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Solution

The fourth proportional to 3,550.64, 4,899.89 and 1,978.79 is: 2,730.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,550.64 : 4,899.89 = 1,978.79 : x
  2. Step 2: Convert to fraction form
    3,550.64/4,899.89 = 1,978.79/x
  3. Step 3: Cross multiply
    3,550.64x = 4,899.89 × 1,978.79
  4. Step 4: Simplify right side
    3,550.64x = 9,695,843.44
  5. Step 5: Solve for x
    x = 9,695,843.44/3,550.64
  6. Step 6: Final answer
    x = 2,730.73

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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.