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Finding the Fourth Proportional to 3,696, 5,100.80 and 2,040.32

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Solution

The fourth proportional to 3,696, 5,100.80 and 2,040.32 is: 2,815.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,696 : 5,100.80 = 2,040.32 : x
  2. Step 2: Convert to fraction form
    3,696/5,100.80 = 2,040.32/x
  3. Step 3: Cross multiply
    3,696x = 5,100.80 × 2,040.32
  4. Step 4: Simplify right side
    3,696x = 10,407,264.26
  5. Step 5: Solve for x
    x = 10,407,264.26/3,696
  6. Step 6: Final answer
    x = 2,815.82

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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.