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Finding the Fourth Proportional to 2,760, 3,808.80 and 2,025.28

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Solution

The fourth proportional to 2,760, 3,808.80 and 2,025.28 is: 2,794.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,760 : 3,808.80 = 2,025.28 : x
  2. Step 2: Convert to fraction form
    2,760/3,808.80 = 2,025.28/x
  3. Step 3: Cross multiply
    2,760x = 3,808.80 × 2,025.28
  4. Step 4: Simplify right side
    2,760x = 7,713,886.46
  5. Step 5: Solve for x
    x = 7,713,886.46/2,760
  6. Step 6: Final answer
    x = 2,794.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.