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Finding the Fourth Proportional to 1,091.45, 1,636.83 and 1,028.57

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Solution

The fourth proportional to 1,091.45, 1,636.83 and 1,028.57 is: 1,542.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.45 : 1,636.83 = 1,028.57 : x
  2. Step 2: Convert to fraction form
    1,091.45/1,636.83 = 1,028.57/x
  3. Step 3: Cross multiply
    1,091.45x = 1,636.83 × 1,028.57
  4. Step 4: Simplify right side
    1,091.45x = 1,683,602.75
  5. Step 5: Solve for x
    x = 1,683,602.75/1,091.45
  6. Step 6: Final answer
    x = 1,542.54

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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.