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Finding the Fourth Proportional to 2,868, 4,302 and 920.28

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Solution

The fourth proportional to 2,868, 4,302 and 920.28 is: 1,380.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868 : 4,302 = 920.28 : x
  2. Step 2: Convert to fraction form
    2,868/4,302 = 920.28/x
  3. Step 3: Cross multiply
    2,868x = 4,302 × 920.28
  4. Step 4: Simplify right side
    2,868x = 3,959,044.56
  5. Step 5: Solve for x
    x = 3,959,044.56/2,868
  6. Step 6: Final answer
    x = 1,380.42

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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.