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Finding the Fourth Proportional to 2,676.33, 4,013.50 and 920.84

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Solution

The fourth proportional to 2,676.33, 4,013.50 and 920.84 is: 1,380.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,676.33 : 4,013.50 = 920.84 : x
  2. Step 2: Convert to fraction form
    2,676.33/4,013.50 = 920.84/x
  3. Step 3: Cross multiply
    2,676.33x = 4,013.50 × 920.84
  4. Step 4: Simplify right side
    2,676.33x = 3,695,785.75
  5. Step 5: Solve for x
    x = 3,695,785.75/2,676.33
  6. Step 6: Final answer
    x = 1,380.91

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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.