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Finding the Fourth Proportional to 3,978.65, 5,967.97 and 1,512.90

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Solution

The fourth proportional to 3,978.65, 5,967.97 and 1,512.90 is: 2,269.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978.65 : 5,967.97 = 1,512.90 : x
  2. Step 2: Convert to fraction form
    3,978.65/5,967.97 = 1,512.90/x
  3. Step 3: Cross multiply
    3,978.65x = 5,967.97 × 1,512.90
  4. Step 4: Simplify right side
    3,978.65x = 9,028,911.97
  5. Step 5: Solve for x
    x = 9,028,911.97/3,978.65
  6. Step 6: Final answer
    x = 2,269.34

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