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Finding the Fourth Proportional to 3,676.62, 5,515.32 and 1,485

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Solution

The fourth proportional to 3,676.62, 5,515.32 and 1,485 is: 2,227.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,676.62 : 5,515.32 = 1,485 : x
  2. Step 2: Convert to fraction form
    3,676.62/5,515.32 = 1,485/x
  3. Step 3: Cross multiply
    3,676.62x = 5,515.32 × 1,485
  4. Step 4: Simplify right side
    3,676.62x = 8,190,250.20
  5. Step 5: Solve for x
    x = 8,190,250.20/3,676.62
  6. Step 6: Final answer
    x = 2,227.66

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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.