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Finding the Fourth Proportional to 498.76, 748.74 and 316.91

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Solution

The fourth proportional to 498.76, 748.74 and 316.91 is: 475.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.76 : 748.74 = 316.91 : x
  2. Step 2: Convert to fraction form
    498.76/748.74 = 316.91/x
  3. Step 3: Cross multiply
    498.76x = 748.74 × 316.91
  4. Step 4: Simplify right side
    498.76x = 237,286.25
  5. Step 5: Solve for x
    x = 237,286.25/498.76
  6. Step 6: Final answer
    x = 475.75

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