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Finding the Fourth Proportional to 3,109, 4,663.98 and 1,811.08

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Solution

The fourth proportional to 3,109, 4,663.98 and 1,811.08 is: 2,716.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109 : 4,663.98 = 1,811.08 : x
  2. Step 2: Convert to fraction form
    3,109/4,663.98 = 1,811.08/x
  3. Step 3: Cross multiply
    3,109x = 4,663.98 × 1,811.08
  4. Step 4: Simplify right side
    3,109x = 8,446,840.90
  5. Step 5: Solve for x
    x = 8,446,840.90/3,109
  6. Step 6: Final answer
    x = 2,716.90

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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.