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Finding the Fourth Proportional to 3,408.68, 4,703.91 and 1,916.57

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Solution

The fourth proportional to 3,408.68, 4,703.91 and 1,916.57 is: 2,644.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,408.68 : 4,703.91 = 1,916.57 : x
  2. Step 2: Convert to fraction form
    3,408.68/4,703.91 = 1,916.57/x
  3. Step 3: Cross multiply
    3,408.68x = 4,703.91 × 1,916.57
  4. Step 4: Simplify right side
    3,408.68x = 9,015,349.27
  5. Step 5: Solve for x
    x = 9,015,349.27/3,408.68
  6. Step 6: Final answer
    x = 2,644.83

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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.