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Finding the Fourth Proportional to 1,100.75, 1,650.09 and 369.80

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Solution

The fourth proportional to 1,100.75, 1,650.09 and 369.80 is: 554.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.75 : 1,650.09 = 369.80 : x
  2. Step 2: Convert to fraction form
    1,100.75/1,650.09 = 369.80/x
  3. Step 3: Cross multiply
    1,100.75x = 1,650.09 × 369.80
  4. Step 4: Simplify right side
    1,100.75x = 610,203.28
  5. Step 5: Solve for x
    x = 610,203.28/1,100.75
  6. Step 6: Final answer
    x = 554.35

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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.