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Finding the Fourth Proportional to 2,052.07, 3,078.30 and 665.44

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Solution

The fourth proportional to 2,052.07, 3,078.30 and 665.44 is: 998.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,052.07 : 3,078.30 = 665.44 : x
  2. Step 2: Convert to fraction form
    2,052.07/3,078.30 = 665.44/x
  3. Step 3: Cross multiply
    2,052.07x = 3,078.30 × 665.44
  4. Step 4: Simplify right side
    2,052.07x = 2,048,423.95
  5. Step 5: Solve for x
    x = 2,048,423.95/2,052.07
  6. Step 6: Final answer
    x = 998.22

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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.