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Finding the Fourth Proportional to 1,324.16, 1,987.16 and 1,313.90

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Solution

The fourth proportional to 1,324.16, 1,987.16 and 1,313.90 is: 1,971.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.16 : 1,987.16 = 1,313.90 : x
  2. Step 2: Convert to fraction form
    1,324.16/1,987.16 = 1,313.90/x
  3. Step 3: Cross multiply
    1,324.16x = 1,987.16 × 1,313.90
  4. Step 4: Simplify right side
    1,324.16x = 2,610,929.52
  5. Step 5: Solve for x
    x = 2,610,929.52/1,324.16
  6. Step 6: Final answer
    x = 1,971.76

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