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Finding the Fourth Proportional to 3,375.75, 5,039.20 and 2,916.48

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Solution

The fourth proportional to 3,375.75, 5,039.20 and 2,916.48 is: 4,353.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,375.75 : 5,039.20 = 2,916.48 : x
  2. Step 2: Convert to fraction form
    3,375.75/5,039.20 = 2,916.48/x
  3. Step 3: Cross multiply
    3,375.75x = 5,039.20 × 2,916.48
  4. Step 4: Simplify right side
    3,375.75x = 14,696,726.02
  5. Step 5: Solve for x
    x = 14,696,726.02/3,375.75
  6. Step 6: Final answer
    x = 4,353.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.