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Finding the Fourth Proportional to 3,817.74, 5,727.42 and 1,319.16

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Solution

The fourth proportional to 3,817.74, 5,727.42 and 1,319.16 is: 1,979.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,817.74 : 5,727.42 = 1,319.16 : x
  2. Step 2: Convert to fraction form
    3,817.74/5,727.42 = 1,319.16/x
  3. Step 3: Cross multiply
    3,817.74x = 5,727.42 × 1,319.16
  4. Step 4: Simplify right side
    3,817.74x = 7,555,383.37
  5. Step 5: Solve for x
    x = 7,555,383.37/3,817.74
  6. Step 6: Final answer
    x = 1,979.02

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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.