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Finding the Fourth Proportional to 3,751.97, 5,628.80 and 1,286.78

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Solution

The fourth proportional to 3,751.97, 5,628.80 and 1,286.78 is: 1,930.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,751.97 : 5,628.80 = 1,286.78 : x
  2. Step 2: Convert to fraction form
    3,751.97/5,628.80 = 1,286.78/x
  3. Step 3: Cross multiply
    3,751.97x = 5,628.80 × 1,286.78
  4. Step 4: Simplify right side
    3,751.97x = 7,243,002.34
  5. Step 5: Solve for x
    x = 7,243,002.34/3,751.97
  6. Step 6: Final answer
    x = 1,930.46

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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.