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Finding the Fourth Proportional to 1,978.74, 2,968.08 and 680.22

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Solution

The fourth proportional to 1,978.74, 2,968.08 and 680.22 is: 1,020.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,978.74 : 2,968.08 = 680.22 : x
  2. Step 2: Convert to fraction form
    1,978.74/2,968.08 = 680.22/x
  3. Step 3: Cross multiply
    1,978.74x = 2,968.08 × 680.22
  4. Step 4: Simplify right side
    1,978.74x = 2,018,947.38
  5. Step 5: Solve for x
    x = 2,018,947.38/1,978.74
  6. Step 6: Final answer
    x = 1,020.32

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