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Finding the Fourth Proportional to 1,763.76, 2,647.08 and 789.96

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Solution

The fourth proportional to 1,763.76, 2,647.08 and 789.96 is: 1,185.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,763.76 : 2,647.08 = 789.96 : x
  2. Step 2: Convert to fraction form
    1,763.76/2,647.08 = 789.96/x
  3. Step 3: Cross multiply
    1,763.76x = 2,647.08 × 789.96
  4. Step 4: Simplify right side
    1,763.76x = 2,091,087.32
  5. Step 5: Solve for x
    x = 2,091,087.32/1,763.76
  6. Step 6: Final answer
    x = 1,185.58

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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.