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Finding the Fourth Proportional to 2,771.62, 4,158.12 and 823.82

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Solution

The fourth proportional to 2,771.62, 4,158.12 and 823.82 is: 1,235.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,771.62 : 4,158.12 = 823.82 : x
  2. Step 2: Convert to fraction form
    2,771.62/4,158.12 = 823.82/x
  3. Step 3: Cross multiply
    2,771.62x = 4,158.12 × 823.82
  4. Step 4: Simplify right side
    2,771.62x = 3,425,542.42
  5. Step 5: Solve for x
    x = 3,425,542.42/2,771.62
  6. Step 6: Final answer
    x = 1,235.94

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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.