Home / 3,138.62-4,705.52-1,905.68

Finding the Fourth Proportional to 3,138.62, 4,705.52 and 1,905.68

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Solution

The fourth proportional to 3,138.62, 4,705.52 and 1,905.68 is: 2,857.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.62 : 4,705.52 = 1,905.68 : x
  2. Step 2: Convert to fraction form
    3,138.62/4,705.52 = 1,905.68/x
  3. Step 3: Cross multiply
    3,138.62x = 4,705.52 × 1,905.68
  4. Step 4: Simplify right side
    3,138.62x = 8,967,217.59
  5. Step 5: Solve for x
    x = 8,967,217.59/3,138.62
  6. Step 6: Final answer
    x = 2,857.06

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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.