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Finding the Fourth Proportional to 1,319.02, 1,979.76 and 670.24

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Solution

The fourth proportional to 1,319.02, 1,979.76 and 670.24 is: 1,005.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.02 : 1,979.76 = 670.24 : x
  2. Step 2: Convert to fraction form
    1,319.02/1,979.76 = 670.24/x
  3. Step 3: Cross multiply
    1,319.02x = 1,979.76 × 670.24
  4. Step 4: Simplify right side
    1,319.02x = 1,326,914.34
  5. Step 5: Solve for x
    x = 1,326,914.34/1,319.02
  6. Step 6: Final answer
    x = 1,005.99

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