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Finding the Fourth Proportional to 3,984.54, 5,487.48 and 3,898.44

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Solution

The fourth proportional to 3,984.54, 5,487.48 and 3,898.44 is: 5,368.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,984.54 : 5,487.48 = 3,898.44 : x
  2. Step 2: Convert to fraction form
    3,984.54/5,487.48 = 3,898.44/x
  3. Step 3: Cross multiply
    3,984.54x = 5,487.48 × 3,898.44
  4. Step 4: Simplify right side
    3,984.54x = 21,392,611.53
  5. Step 5: Solve for x
    x = 21,392,611.53/3,984.54
  6. Step 6: Final answer
    x = 5,368.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.