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Finding the Fourth Proportional to 3,318.95, 4,982.09 and 2,805.32

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Solution

The fourth proportional to 3,318.95, 4,982.09 and 2,805.32 is: 4,211.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.95 : 4,982.09 = 2,805.32 : x
  2. Step 2: Convert to fraction form
    3,318.95/4,982.09 = 2,805.32/x
  3. Step 3: Cross multiply
    3,318.95x = 4,982.09 × 2,805.32
  4. Step 4: Simplify right side
    3,318.95x = 13,976,317.78
  5. Step 5: Solve for x
    x = 13,976,317.78/3,318.95
  6. Step 6: Final answer
    x = 4,211.07

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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.