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Finding the Fourth Proportional to 3,855.89, 5,783.99 and 1,515.69

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Solution

The fourth proportional to 3,855.89, 5,783.99 and 1,515.69 is: 2,273.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.89 : 5,783.99 = 1,515.69 : x
  2. Step 2: Convert to fraction form
    3,855.89/5,783.99 = 1,515.69/x
  3. Step 3: Cross multiply
    3,855.89x = 5,783.99 × 1,515.69
  4. Step 4: Simplify right side
    3,855.89x = 8,766,728.22
  5. Step 5: Solve for x
    x = 8,766,728.22/3,855.89
  6. Step 6: Final answer
    x = 2,273.60

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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.