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Finding the Fourth Proportional to 5,078.52, 7,620.70 and 2,738.52

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Solution

The fourth proportional to 5,078.52, 7,620.70 and 2,738.52 is: 4,109.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.52 : 7,620.70 = 2,738.52 : x
  2. Step 2: Convert to fraction form
    5,078.52/7,620.70 = 2,738.52/x
  3. Step 3: Cross multiply
    5,078.52x = 7,620.70 × 2,738.52
  4. Step 4: Simplify right side
    5,078.52x = 20,869,432.52
  5. Step 5: Solve for x
    x = 20,869,432.52/5,078.52
  6. Step 6: Final answer
    x = 4,109.35

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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.