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Finding the Fourth Proportional to 442.96, 663 and 394.96

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Solution

The fourth proportional to 442.96, 663 and 394.96 is: 591.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.96 : 663 = 394.96 : x
  2. Step 2: Convert to fraction form
    442.96/663 = 394.96/x
  3. Step 3: Cross multiply
    442.96x = 663 × 394.96
  4. Step 4: Simplify right side
    442.96x = 261,858.48
  5. Step 5: Solve for x
    x = 261,858.48/442.96
  6. Step 6: Final answer
    x = 591.16

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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.