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Finding the Fourth Proportional to 3,705.90, 5,112.90 and 2,133.96

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Solution

The fourth proportional to 3,705.90, 5,112.90 and 2,133.96 is: 2,944.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,705.90 : 5,112.90 = 2,133.96 : x
  2. Step 2: Convert to fraction form
    3,705.90/5,112.90 = 2,133.96/x
  3. Step 3: Cross multiply
    3,705.90x = 5,112.90 × 2,133.96
  4. Step 4: Simplify right side
    3,705.90x = 10,910,724.08
  5. Step 5: Solve for x
    x = 10,910,724.08/3,705.90
  6. Step 6: Final answer
    x = 2,944.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.