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Finding the Fourth Proportional to 3,875.88, 5,812 and 1,408.96

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Solution

The fourth proportional to 3,875.88, 5,812 and 1,408.96 is: 2,112.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,875.88 : 5,812 = 1,408.96 : x
  2. Step 2: Convert to fraction form
    3,875.88/5,812 = 1,408.96/x
  3. Step 3: Cross multiply
    3,875.88x = 5,812 × 1,408.96
  4. Step 4: Simplify right side
    3,875.88x = 8,188,875.52
  5. Step 5: Solve for x
    x = 8,188,875.52/3,875.88
  6. Step 6: Final answer
    x = 2,112.78

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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.