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Finding the Fourth Proportional to 3,208, 4,812 and 1,384

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Solution

The fourth proportional to 3,208, 4,812 and 1,384 is: 2,076

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,208 : 4,812 = 1,384 : x
  2. Step 2: Convert to fraction form
    3,208/4,812 = 1,384/x
  3. Step 3: Cross multiply
    3,208x = 4,812 × 1,384
  4. Step 4: Simplify right side
    3,208x = 6,659,808
  5. Step 5: Solve for x
    x = 6,659,808/3,208
  6. Step 6: Final answer
    x = 2,076

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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.