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Finding the Fourth Proportional to 4,978.45, 7,464.39 and 2,379.97

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Solution

The fourth proportional to 4,978.45, 7,464.39 and 2,379.97 is: 3,568.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978.45 : 7,464.39 = 2,379.97 : x
  2. Step 2: Convert to fraction form
    4,978.45/7,464.39 = 2,379.97/x
  3. Step 3: Cross multiply
    4,978.45x = 7,464.39 × 2,379.97
  4. Step 4: Simplify right side
    4,978.45x = 17,765,024.27
  5. Step 5: Solve for x
    x = 17,765,024.27/4,978.45
  6. Step 6: Final answer
    x = 3,568.38

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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.