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Finding the Fourth Proportional to 6,278.64, 8,662.32 and 3,919.92

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Solution

The fourth proportional to 6,278.64, 8,662.32 and 3,919.92 is: 5,408.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,278.64 : 8,662.32 = 3,919.92 : x
  2. Step 2: Convert to fraction form
    6,278.64/8,662.32 = 3,919.92/x
  3. Step 3: Cross multiply
    6,278.64x = 8,662.32 × 3,919.92
  4. Step 4: Simplify right side
    6,278.64x = 33,955,601.41
  5. Step 5: Solve for x
    x = 33,955,601.41/6,278.64
  6. Step 6: Final answer
    x = 5,408.11

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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.