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Finding the Fourth Proportional to 2,680.60, 4,021.02 and 1,384.60

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Solution

The fourth proportional to 2,680.60, 4,021.02 and 1,384.60 is: 2,076.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.60 : 4,021.02 = 1,384.60 : x
  2. Step 2: Convert to fraction form
    2,680.60/4,021.02 = 1,384.60/x
  3. Step 3: Cross multiply
    2,680.60x = 4,021.02 × 1,384.60
  4. Step 4: Simplify right side
    2,680.60x = 5,567,504.29
  5. Step 5: Solve for x
    x = 5,567,504.29/2,680.60
  6. Step 6: Final answer
    x = 2,076.96

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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.