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Finding the Fourth Proportional to 398.34, 597.60 and 316.98

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Solution

The fourth proportional to 398.34, 597.60 and 316.98 is: 475.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.34 : 597.60 = 316.98 : x
  2. Step 2: Convert to fraction form
    398.34/597.60 = 316.98/x
  3. Step 3: Cross multiply
    398.34x = 597.60 × 316.98
  4. Step 4: Simplify right side
    398.34x = 189,427.25
  5. Step 5: Solve for x
    x = 189,427.25/398.34
  6. Step 6: Final answer
    x = 475.54

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