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Finding the Fourth Proportional to 2,052.38, 3,078.86 and 665.25

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Solution

The fourth proportional to 2,052.38, 3,078.86 and 665.25 is: 997.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,052.38 : 3,078.86 = 665.25 : x
  2. Step 2: Convert to fraction form
    2,052.38/3,078.86 = 665.25/x
  3. Step 3: Cross multiply
    2,052.38x = 3,078.86 × 665.25
  4. Step 4: Simplify right side
    2,052.38x = 2,048,211.62
  5. Step 5: Solve for x
    x = 2,048,211.62/2,052.38
  6. Step 6: Final answer
    x = 997.97

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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.