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Finding the Fourth Proportional to 2,775.20, 4,163.54 and 827.42

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Solution

The fourth proportional to 2,775.20, 4,163.54 and 827.42 is: 1,241.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,775.20 : 4,163.54 = 827.42 : x
  2. Step 2: Convert to fraction form
    2,775.20/4,163.54 = 827.42/x
  3. Step 3: Cross multiply
    2,775.20x = 4,163.54 × 827.42
  4. Step 4: Simplify right side
    2,775.20x = 3,444,971.31
  5. Step 5: Solve for x
    x = 3,444,971.31/2,775.20
  6. Step 6: Final answer
    x = 1,241.34

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1.5x scale

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.