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Finding the Fourth Proportional to 3,447.78, 5,172.48 and 982.64

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Solution

The fourth proportional to 3,447.78, 5,172.48 and 982.64 is: 1,474.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,447.78 : 5,172.48 = 982.64 : x
  2. Step 2: Convert to fraction form
    3,447.78/5,172.48 = 982.64/x
  3. Step 3: Cross multiply
    3,447.78x = 5,172.48 × 982.64
  4. Step 4: Simplify right side
    3,447.78x = 5,082,659.88
  5. Step 5: Solve for x
    x = 5,082,659.88/3,447.78
  6. Step 6: Final answer
    x = 1,474.18

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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.