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Finding the Fourth Proportional to 4,783.11, 7,171.72 and 1,661.77

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Solution

The fourth proportional to 4,783.11, 7,171.72 and 1,661.77 is: 2,491.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,783.11 : 7,171.72 = 1,661.77 : x
  2. Step 2: Convert to fraction form
    4,783.11/7,171.72 = 1,661.77/x
  3. Step 3: Cross multiply
    4,783.11x = 7,171.72 × 1,661.77
  4. Step 4: Simplify right side
    4,783.11x = 11,917,749.14
  5. Step 5: Solve for x
    x = 11,917,749.14/4,783.11
  6. Step 6: Final answer
    x = 2,491.63

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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.