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Finding the Fourth Proportional to 2,776.80, 4,165.97 and 1,789.95

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Solution

The fourth proportional to 2,776.80, 4,165.97 and 1,789.95 is: 2,685.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,776.80 : 4,165.97 = 1,789.95 : x
  2. Step 2: Convert to fraction form
    2,776.80/4,165.97 = 1,789.95/x
  3. Step 3: Cross multiply
    2,776.80x = 4,165.97 × 1,789.95
  4. Step 4: Simplify right side
    2,776.80x = 7,456,878.00
  5. Step 5: Solve for x
    x = 7,456,878.00/2,776.80
  6. Step 6: Final answer
    x = 2,685.42

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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.