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Finding the Fourth Proportional to 498.92, 748.46 and 210.40

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Solution

The fourth proportional to 498.92, 748.46 and 210.40 is: 315.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.92 : 748.46 = 210.40 : x
  2. Step 2: Convert to fraction form
    498.92/748.46 = 210.40/x
  3. Step 3: Cross multiply
    498.92x = 748.46 × 210.40
  4. Step 4: Simplify right side
    498.92x = 157,475.98
  5. Step 5: Solve for x
    x = 157,475.98/498.92
  6. Step 6: Final answer
    x = 315.63

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