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Finding the Fourth Proportional to 3,408.80, 4,704.20 and 1,916.71

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Solution

The fourth proportional to 3,408.80, 4,704.20 and 1,916.71 is: 2,645.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,408.80 : 4,704.20 = 1,916.71 : x
  2. Step 2: Convert to fraction form
    3,408.80/4,704.20 = 1,916.71/x
  3. Step 3: Cross multiply
    3,408.80x = 4,704.20 × 1,916.71
  4. Step 4: Simplify right side
    3,408.80x = 9,016,587.18
  5. Step 5: Solve for x
    x = 9,016,587.18/3,408.80
  6. Step 6: Final answer
    x = 2,645.09

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1.5x scale

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.