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Finding the Fourth Proportional to 2,771.88, 4,158 and 1,040.55

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Solution

The fourth proportional to 2,771.88, 4,158 and 1,040.55 is: 1,560.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,771.88 : 4,158 = 1,040.55 : x
  2. Step 2: Convert to fraction form
    2,771.88/4,158 = 1,040.55/x
  3. Step 3: Cross multiply
    2,771.88x = 4,158 × 1,040.55
  4. Step 4: Simplify right side
    2,771.88x = 4,326,606.90
  5. Step 5: Solve for x
    x = 4,326,606.90/2,771.88
  6. Step 6: Final answer
    x = 1,560.89

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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.