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Finding the Fourth Proportional to 3,951.76, 5,928.64 and 1,486.64

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Solution

The fourth proportional to 3,951.76, 5,928.64 and 1,486.64 is: 2,230.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.76 : 5,928.64 = 1,486.64 : x
  2. Step 2: Convert to fraction form
    3,951.76/5,928.64 = 1,486.64/x
  3. Step 3: Cross multiply
    3,951.76x = 5,928.64 × 1,486.64
  4. Step 4: Simplify right side
    3,951.76x = 8,813,753.37
  5. Step 5: Solve for x
    x = 8,813,753.37/3,951.76
  6. Step 6: Final answer
    x = 2,230.34

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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.