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Finding the Fourth Proportional to 285.58, 428.44 and 168.55

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Solution

The fourth proportional to 285.58, 428.44 and 168.55 is: 252.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.58 : 428.44 = 168.55 : x
  2. Step 2: Convert to fraction form
    285.58/428.44 = 168.55/x
  3. Step 3: Cross multiply
    285.58x = 428.44 × 168.55
  4. Step 4: Simplify right side
    285.58x = 72,212.49
  5. Step 5: Solve for x
    x = 72,212.49/285.58
  6. Step 6: Final answer
    x = 252.86

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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.