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Finding the Fourth Proportional to 285.96, 427.94 and 243.72

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Solution

The fourth proportional to 285.96, 427.94 and 243.72 is: 364.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.96 : 427.94 = 243.72 : x
  2. Step 2: Convert to fraction form
    285.96/427.94 = 243.72/x
  3. Step 3: Cross multiply
    285.96x = 427.94 × 243.72
  4. Step 4: Simplify right side
    285.96x = 104,297.54
  5. Step 5: Solve for x
    x = 104,297.54/285.96
  6. Step 6: Final answer
    x = 364.73

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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.