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Finding the Fourth Proportional to 1,100, 1,647.94 and 551.54

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Solution

The fourth proportional to 1,100, 1,647.94 and 551.54 is: 826.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100 : 1,647.94 = 551.54 : x
  2. Step 2: Convert to fraction form
    1,100/1,647.94 = 551.54/x
  3. Step 3: Cross multiply
    1,100x = 1,647.94 × 551.54
  4. Step 4: Simplify right side
    1,100x = 908,904.83
  5. Step 5: Solve for x
    x = 908,904.83/1,100
  6. Step 6: Final answer
    x = 826.28

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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.