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Finding the Fourth Proportional to 3,751.94, 5,628.62 and 1,287.11

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Solution

The fourth proportional to 3,751.94, 5,628.62 and 1,287.11 is: 1,930.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,751.94 : 5,628.62 = 1,287.11 : x
  2. Step 2: Convert to fraction form
    3,751.94/5,628.62 = 1,287.11/x
  3. Step 3: Cross multiply
    3,751.94x = 5,628.62 × 1,287.11
  4. Step 4: Simplify right side
    3,751.94x = 7,244,670.38
  5. Step 5: Solve for x
    x = 7,244,670.38/3,751.94
  6. Step 6: Final answer
    x = 1,930.91

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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.