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Finding the Fourth Proportional to 275,980.82, 380,864.33 and 155,121.73

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Solution

The fourth proportional to 275,980.82, 380,864.33 and 155,121.73 is: 214,074.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,980.82 : 380,864.33 = 155,121.73 : x
  2. Step 2: Convert to fraction form
    275,980.82/380,864.33 = 155,121.73/x
  3. Step 3: Cross multiply
    275,980.82x = 380,864.33 × 155,121.73
  4. Step 4: Simplify right side
    275,980.82x = 59,080,334,761.19
  5. Step 5: Solve for x
    x = 59,080,334,761.19/275,980.82
  6. Step 6: Final answer
    x = 214,074.06

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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.