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Finding the Fourth Proportional to 3,845.87, 5,768.80 and 1,248.80

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Solution

The fourth proportional to 3,845.87, 5,768.80 and 1,248.80 is: 1,873.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,845.87 : 5,768.80 = 1,248.80 : x
  2. Step 2: Convert to fraction form
    3,845.87/5,768.80 = 1,248.80/x
  3. Step 3: Cross multiply
    3,845.87x = 5,768.80 × 1,248.80
  4. Step 4: Simplify right side
    3,845.87x = 7,204,109.29
  5. Step 5: Solve for x
    x = 7,204,109.29/3,845.87
  6. Step 6: Final answer
    x = 1,873.21

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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.