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Finding the Fourth Proportional to 3,276.84, 4,914.49 and 936.78

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Solution

The fourth proportional to 3,276.84, 4,914.49 and 936.78 is: 1,404.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,276.84 : 4,914.49 = 936.78 : x
  2. Step 2: Convert to fraction form
    3,276.84/4,914.49 = 936.78/x
  3. Step 3: Cross multiply
    3,276.84x = 4,914.49 × 936.78
  4. Step 4: Simplify right side
    3,276.84x = 4,603,795.94
  5. Step 5: Solve for x
    x = 4,603,795.94/3,276.84
  6. Step 6: Final answer
    x = 1,404.95

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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.