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Finding the Fourth Proportional to 416.20, 623.07 and 308.47

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Solution

The fourth proportional to 416.20, 623.07 and 308.47 is: 461.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.20 : 623.07 = 308.47 : x
  2. Step 2: Convert to fraction form
    416.20/623.07 = 308.47/x
  3. Step 3: Cross multiply
    416.20x = 623.07 × 308.47
  4. Step 4: Simplify right side
    416.20x = 192,198.40
  5. Step 5: Solve for x
    x = 192,198.40/416.20
  6. Step 6: Final answer
    x = 461.79

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.