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Finding the Fourth Proportional to 619.25, 928.98 and 208.43

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Solution

The fourth proportional to 619.25, 928.98 and 208.43 is: 312.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.25 : 928.98 = 208.43 : x
  2. Step 2: Convert to fraction form
    619.25/928.98 = 208.43/x
  3. Step 3: Cross multiply
    619.25x = 928.98 × 208.43
  4. Step 4: Simplify right side
    619.25x = 193,622.66
  5. Step 5: Solve for x
    x = 193,622.66/619.25
  6. Step 6: Final answer
    x = 312.67

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