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Finding the Fourth Proportional to 442.56, 662.88 and 418.60

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Solution

The fourth proportional to 442.56, 662.88 and 418.60 is: 626.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.56 : 662.88 = 418.60 : x
  2. Step 2: Convert to fraction form
    442.56/662.88 = 418.60/x
  3. Step 3: Cross multiply
    442.56x = 662.88 × 418.60
  4. Step 4: Simplify right side
    442.56x = 277,481.57
  5. Step 5: Solve for x
    x = 277,481.57/442.56
  6. Step 6: Final answer
    x = 626.99

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Why These Related Problems?

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