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Finding the Fourth Proportional to 1,319.74, 1,979.01 and 497.43

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Solution

The fourth proportional to 1,319.74, 1,979.01 and 497.43 is: 745.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.74 : 1,979.01 = 497.43 : x
  2. Step 2: Convert to fraction form
    1,319.74/1,979.01 = 497.43/x
  3. Step 3: Cross multiply
    1,319.74x = 1,979.01 × 497.43
  4. Step 4: Simplify right side
    1,319.74x = 984,418.94
  5. Step 5: Solve for x
    x = 984,418.94/1,319.74
  6. Step 6: Final answer
    x = 745.92

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