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Finding the Fourth Proportional to 3,579.75, 5,370.39 and 1,388.48

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Solution

The fourth proportional to 3,579.75, 5,370.39 and 1,388.48 is: 2,083.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,579.75 : 5,370.39 = 1,388.48 : x
  2. Step 2: Convert to fraction form
    3,579.75/5,370.39 = 1,388.48/x
  3. Step 3: Cross multiply
    3,579.75x = 5,370.39 × 1,388.48
  4. Step 4: Simplify right side
    3,579.75x = 7,456,652.26
  5. Step 5: Solve for x
    x = 7,456,652.26/3,579.75
  6. Step 6: Final answer
    x = 2,083.01

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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.