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Finding the Fourth Proportional to 3,907, 5,860.50 and 1,171

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Solution

The fourth proportional to 3,907, 5,860.50 and 1,171 is: 1,756.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907 : 5,860.50 = 1,171 : x
  2. Step 2: Convert to fraction form
    3,907/5,860.50 = 1,171/x
  3. Step 3: Cross multiply
    3,907x = 5,860.50 × 1,171
  4. Step 4: Simplify right side
    3,907x = 6,862,645.50
  5. Step 5: Solve for x
    x = 6,862,645.50/3,907
  6. Step 6: Final answer
    x = 1,756.50

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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.