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Finding the Fourth Proportional to 3,904.98, 5,372.51 and 3,408.77

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Solution

The fourth proportional to 3,904.98, 5,372.51 and 3,408.77 is: 4,689.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,904.98 : 5,372.51 = 3,408.77 : x
  2. Step 2: Convert to fraction form
    3,904.98/5,372.51 = 3,408.77/x
  3. Step 3: Cross multiply
    3,904.98x = 5,372.51 × 3,408.77
  4. Step 4: Simplify right side
    3,904.98x = 18,313,607.01
  5. Step 5: Solve for x
    x = 18,313,607.01/3,904.98
  6. Step 6: Final answer
    x = 4,689.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.