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Finding the Fourth Proportional to 662.96, 993.08 and 315.80

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Solution

The fourth proportional to 662.96, 993.08 and 315.80 is: 473.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.96 : 993.08 = 315.80 : x
  2. Step 2: Convert to fraction form
    662.96/993.08 = 315.80/x
  3. Step 3: Cross multiply
    662.96x = 993.08 × 315.80
  4. Step 4: Simplify right side
    662.96x = 313,614.66
  5. Step 5: Solve for x
    x = 313,614.66/662.96
  6. Step 6: Final answer
    x = 473.05

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