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Finding the Fourth Proportional to 3,320.73, 4,978.67 and 1,676.43

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Solution

The fourth proportional to 3,320.73, 4,978.67 and 1,676.43 is: 2,513.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320.73 : 4,978.67 = 1,676.43 : x
  2. Step 2: Convert to fraction form
    3,320.73/4,978.67 = 1,676.43/x
  3. Step 3: Cross multiply
    3,320.73x = 4,978.67 × 1,676.43
  4. Step 4: Simplify right side
    3,320.73x = 8,346,383.37
  5. Step 5: Solve for x
    x = 8,346,383.37/3,320.73
  6. Step 6: Final answer
    x = 2,513.42

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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.