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Finding the Fourth Proportional to 1,836.72, 2,754.60 and 683.28

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Solution

The fourth proportional to 1,836.72, 2,754.60 and 683.28 is: 1,024.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,836.72 : 2,754.60 = 683.28 : x
  2. Step 2: Convert to fraction form
    1,836.72/2,754.60 = 683.28/x
  3. Step 3: Cross multiply
    1,836.72x = 2,754.60 × 683.28
  4. Step 4: Simplify right side
    1,836.72x = 1,882,163.09
  5. Step 5: Solve for x
    x = 1,882,163.09/1,836.72
  6. Step 6: Final answer
    x = 1,024.74

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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.