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Finding the Fourth Proportional to 4,939.91, 7,410.87 and 2,018.45

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Solution

The fourth proportional to 4,939.91, 7,410.87 and 2,018.45 is: 3,028.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,939.91 : 7,410.87 = 2,018.45 : x
  2. Step 2: Convert to fraction form
    4,939.91/7,410.87 = 2,018.45/x
  3. Step 3: Cross multiply
    4,939.91x = 7,410.87 × 2,018.45
  4. Step 4: Simplify right side
    4,939.91x = 14,958,470.55
  5. Step 5: Solve for x
    x = 14,958,470.55/4,939.91
  6. Step 6: Final answer
    x = 3,028.09

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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.