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Finding the Fourth Proportional to 578.19, 866.20 and 449.67

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Solution

The fourth proportional to 578.19, 866.20 and 449.67 is: 673.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.19 : 866.20 = 449.67 : x
  2. Step 2: Convert to fraction form
    578.19/866.20 = 449.67/x
  3. Step 3: Cross multiply
    578.19x = 866.20 × 449.67
  4. Step 4: Simplify right side
    578.19x = 389,498.70
  5. Step 5: Solve for x
    x = 389,498.70/578.19
  6. Step 6: Final answer
    x = 673.66

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