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Finding the Fourth Proportional to 2,431.36, 3,647.42 and 892

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Solution

The fourth proportional to 2,431.36, 3,647.42 and 892 is: 1,338.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,431.36 : 3,647.42 = 892 : x
  2. Step 2: Convert to fraction form
    2,431.36/3,647.42 = 892/x
  3. Step 3: Cross multiply
    2,431.36x = 3,647.42 × 892
  4. Step 4: Simplify right side
    2,431.36x = 3,253,498.64
  5. Step 5: Solve for x
    x = 3,253,498.64/2,431.36
  6. Step 6: Final answer
    x = 1,338.14

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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.