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Finding the Fourth Proportional to 275,634.88, 380,409.78 and 154,781.26

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Solution

The fourth proportional to 275,634.88, 380,409.78 and 154,781.26 is: 213,617.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,634.88 : 380,409.78 = 154,781.26 : x
  2. Step 2: Convert to fraction form
    275,634.88/380,409.78 = 154,781.26/x
  3. Step 3: Cross multiply
    275,634.88x = 380,409.78 × 154,781.26
  4. Step 4: Simplify right side
    275,634.88x = 58,880,305,064.72
  5. Step 5: Solve for x
    x = 58,880,305,064.72/275,634.88
  6. Step 6: Final answer
    x = 213,617.03

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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.