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Finding the Fourth Proportional to 285.62, 427.83 and 163.82

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Solution

The fourth proportional to 285.62, 427.83 and 163.82 is: 245.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.62 : 427.83 = 163.82 : x
  2. Step 2: Convert to fraction form
    285.62/427.83 = 163.82/x
  3. Step 3: Cross multiply
    285.62x = 427.83 × 163.82
  4. Step 4: Simplify right side
    285.62x = 70,087.11
  5. Step 5: Solve for x
    x = 70,087.11/285.62
  6. Step 6: Final answer
    x = 245.39

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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.