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Finding the Fourth Proportional to 1,181.83, 1,769.10 and 1,081.03

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Solution

The fourth proportional to 1,181.83, 1,769.10 and 1,081.03 is: 1,618.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.83 : 1,769.10 = 1,081.03 : x
  2. Step 2: Convert to fraction form
    1,181.83/1,769.10 = 1,081.03/x
  3. Step 3: Cross multiply
    1,181.83x = 1,769.10 × 1,081.03
  4. Step 4: Simplify right side
    1,181.83x = 1,912,450.17
  5. Step 5: Solve for x
    x = 1,912,450.17/1,181.83
  6. Step 6: Final answer
    x = 1,618.21

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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.