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Finding the Fourth Proportional to 3,893.78, 5,841.81 and 1,920.02

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Solution

The fourth proportional to 3,893.78, 5,841.81 and 1,920.02 is: 2,880.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,893.78 : 5,841.81 = 1,920.02 : x
  2. Step 2: Convert to fraction form
    3,893.78/5,841.81 = 1,920.02/x
  3. Step 3: Cross multiply
    3,893.78x = 5,841.81 × 1,920.02
  4. Step 4: Simplify right side
    3,893.78x = 11,216,362.83
  5. Step 5: Solve for x
    x = 11,216,362.83/3,893.78
  6. Step 6: Final answer
    x = 2,880.58

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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.