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Finding the Fourth Proportional to 1,815.65, 2,722.82 and 775.73

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Solution

The fourth proportional to 1,815.65, 2,722.82 and 775.73 is: 1,163.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.65 : 2,722.82 = 775.73 : x
  2. Step 2: Convert to fraction form
    1,815.65/2,722.82 = 775.73/x
  3. Step 3: Cross multiply
    1,815.65x = 2,722.82 × 775.73
  4. Step 4: Simplify right side
    1,815.65x = 2,112,157.12
  5. Step 5: Solve for x
    x = 2,112,157.12/1,815.65
  6. Step 6: Final answer
    x = 1,163.31

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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.