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Finding the Fourth Proportional to 3,424.78, 5,138.63 and 1,084.97

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Solution

The fourth proportional to 3,424.78, 5,138.63 and 1,084.97 is: 1,627.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,424.78 : 5,138.63 = 1,084.97 : x
  2. Step 2: Convert to fraction form
    3,424.78/5,138.63 = 1,084.97/x
  3. Step 3: Cross multiply
    3,424.78x = 5,138.63 × 1,084.97
  4. Step 4: Simplify right side
    3,424.78x = 5,575,274.95
  5. Step 5: Solve for x
    x = 5,575,274.95/3,424.78
  6. Step 6: Final answer
    x = 1,627.92

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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.