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Finding the Fourth Proportional to 2,775.94, 4,164.09 and 828.34

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Solution

The fourth proportional to 2,775.94, 4,164.09 and 828.34 is: 1,242.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,775.94 : 4,164.09 = 828.34 : x
  2. Step 2: Convert to fraction form
    2,775.94/4,164.09 = 828.34/x
  3. Step 3: Cross multiply
    2,775.94x = 4,164.09 × 828.34
  4. Step 4: Simplify right side
    2,775.94x = 3,449,282.31
  5. Step 5: Solve for x
    x = 3,449,282.31/2,775.94
  6. Step 6: Final answer
    x = 1,242.56

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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.