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Finding the Fourth Proportional to 3,418.54, 5,129.46 and 1,858.48

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Solution

The fourth proportional to 3,418.54, 5,129.46 and 1,858.48 is: 2,788.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,418.54 : 5,129.46 = 1,858.48 : x
  2. Step 2: Convert to fraction form
    3,418.54/5,129.46 = 1,858.48/x
  3. Step 3: Cross multiply
    3,418.54x = 5,129.46 × 1,858.48
  4. Step 4: Simplify right side
    3,418.54x = 9,532,998.82
  5. Step 5: Solve for x
    x = 9,532,998.82/3,418.54
  6. Step 6: Final answer
    x = 2,788.62

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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.