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Finding the Fourth Proportional to 3,178.40, 4,760.40 and 1,882.40

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Solution

The fourth proportional to 3,178.40, 4,760.40 and 1,882.40 is: 2,819.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.40 : 4,760.40 = 1,882.40 : x
  2. Step 2: Convert to fraction form
    3,178.40/4,760.40 = 1,882.40/x
  3. Step 3: Cross multiply
    3,178.40x = 4,760.40 × 1,882.40
  4. Step 4: Simplify right side
    3,178.40x = 8,960,976.96
  5. Step 5: Solve for x
    x = 8,960,976.96/3,178.40
  6. Step 6: Final answer
    x = 2,819.34

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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.