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Finding the Fourth Proportional to 2,052.25, 3,078.87 and 665.59

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Solution

The fourth proportional to 2,052.25, 3,078.87 and 665.59 is: 998.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,052.25 : 3,078.87 = 665.59 : x
  2. Step 2: Convert to fraction form
    2,052.25/3,078.87 = 665.59/x
  3. Step 3: Cross multiply
    2,052.25x = 3,078.87 × 665.59
  4. Step 4: Simplify right side
    2,052.25x = 2,049,261.76
  5. Step 5: Solve for x
    x = 2,049,261.76/2,052.25
  6. Step 6: Final answer
    x = 998.54

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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.