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Finding the Fourth Proportional to 3,717, 5,578.06 and 1,285

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Solution

The fourth proportional to 3,717, 5,578.06 and 1,285 is: 1,928.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,717 : 5,578.06 = 1,285 : x
  2. Step 2: Convert to fraction form
    3,717/5,578.06 = 1,285/x
  3. Step 3: Cross multiply
    3,717x = 5,578.06 × 1,285
  4. Step 4: Simplify right side
    3,717x = 7,167,807.10
  5. Step 5: Solve for x
    x = 7,167,807.10/3,717
  6. Step 6: Final answer
    x = 1,928.39

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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.