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Finding the Fourth Proportional to 275,041, 379,556.58 and 155,809

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Solution

The fourth proportional to 275,041, 379,556.58 and 155,809 is: 215,016.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,041 : 379,556.58 = 155,809 : x
  2. Step 2: Convert to fraction form
    275,041/379,556.58 = 155,809/x
  3. Step 3: Cross multiply
    275,041x = 379,556.58 × 155,809
  4. Step 4: Simplify right side
    275,041x = 59,138,331,173.22
  5. Step 5: Solve for x
    x = 59,138,331,173.22/275,041
  6. Step 6: Final answer
    x = 215,016.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.