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Finding the Fourth Proportional to 3,579.88, 5,370.46 and 1,388.68

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Solution

The fourth proportional to 3,579.88, 5,370.46 and 1,388.68 is: 2,083.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,579.88 : 5,370.46 = 1,388.68 : x
  2. Step 2: Convert to fraction form
    3,579.88/5,370.46 = 1,388.68/x
  3. Step 3: Cross multiply
    3,579.88x = 5,370.46 × 1,388.68
  4. Step 4: Simplify right side
    3,579.88x = 7,457,850.39
  5. Step 5: Solve for x
    x = 7,457,850.39/3,579.88
  6. Step 6: Final answer
    x = 2,083.27

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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.