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Finding the Fourth Proportional to 3,900, 5,850.96 and 1,164

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Solution

The fourth proportional to 3,900, 5,850.96 and 1,164 is: 1,746.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900 : 5,850.96 = 1,164 : x
  2. Step 2: Convert to fraction form
    3,900/5,850.96 = 1,164/x
  3. Step 3: Cross multiply
    3,900x = 5,850.96 × 1,164
  4. Step 4: Simplify right side
    3,900x = 6,810,517.44
  5. Step 5: Solve for x
    x = 6,810,517.44/3,900
  6. Step 6: Final answer
    x = 1,746.29

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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.