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Finding the Fourth Proportional to 273.98, 378.06 and 155.94

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Solution

The fourth proportional to 273.98, 378.06 and 155.94 is: 215.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.98 : 378.06 = 155.94 : x
  2. Step 2: Convert to fraction form
    273.98/378.06 = 155.94/x
  3. Step 3: Cross multiply
    273.98x = 378.06 × 155.94
  4. Step 4: Simplify right side
    273.98x = 58,954.68
  5. Step 5: Solve for x
    x = 58,954.68/273.98
  6. Step 6: Final answer
    x = 215.18

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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.