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Finding the Fourth Proportional to 442.37, 662.20 and 279.56

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Solution

The fourth proportional to 442.37, 662.20 and 279.56 is: 418.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.37 : 662.20 = 279.56 : x
  2. Step 2: Convert to fraction form
    442.37/662.20 = 279.56/x
  3. Step 3: Cross multiply
    442.37x = 662.20 × 279.56
  4. Step 4: Simplify right side
    442.37x = 185,124.63
  5. Step 5: Solve for x
    x = 185,124.63/442.37
  6. Step 6: Final answer
    x = 418.48

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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.