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Finding the Fourth Proportional to 3,072.89, 4,609.32 and 764.39

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Solution

The fourth proportional to 3,072.89, 4,609.32 and 764.39 is: 1,146.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,072.89 : 4,609.32 = 764.39 : x
  2. Step 2: Convert to fraction form
    3,072.89/4,609.32 = 764.39/x
  3. Step 3: Cross multiply
    3,072.89x = 4,609.32 × 764.39
  4. Step 4: Simplify right side
    3,072.89x = 3,523,318.11
  5. Step 5: Solve for x
    x = 3,523,318.11/3,072.89
  6. Step 6: Final answer
    x = 1,146.58

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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.