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Finding the Fourth Proportional to 3,469.54, 5,203.80 and 1,277.78

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Solution

The fourth proportional to 3,469.54, 5,203.80 and 1,277.78 is: 1,916.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,469.54 : 5,203.80 = 1,277.78 : x
  2. Step 2: Convert to fraction form
    3,469.54/5,203.80 = 1,277.78/x
  3. Step 3: Cross multiply
    3,469.54x = 5,203.80 × 1,277.78
  4. Step 4: Simplify right side
    3,469.54x = 6,649,311.56
  5. Step 5: Solve for x
    x = 6,649,311.56/3,469.54
  6. Step 6: Final answer
    x = 1,916.48

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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.