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Finding the Fourth Proportional to 2,696.78, 4,047 and 965.41

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Solution

The fourth proportional to 2,696.78, 4,047 and 965.41 is: 1,448.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,696.78 : 4,047 = 965.41 : x
  2. Step 2: Convert to fraction form
    2,696.78/4,047 = 965.41/x
  3. Step 3: Cross multiply
    2,696.78x = 4,047 × 965.41
  4. Step 4: Simplify right side
    2,696.78x = 3,907,014.27
  5. Step 5: Solve for x
    x = 3,907,014.27/2,696.78
  6. Step 6: Final answer
    x = 1,448.77

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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.