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Finding the Fourth Proportional to 273.98, 378.07 and 157.54

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Solution

The fourth proportional to 273.98, 378.07 and 157.54 is: 217.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.98 : 378.07 = 157.54 : x
  2. Step 2: Convert to fraction form
    273.98/378.07 = 157.54/x
  3. Step 3: Cross multiply
    273.98x = 378.07 × 157.54
  4. Step 4: Simplify right side
    273.98x = 59,561.15
  5. Step 5: Solve for x
    x = 59,561.15/273.98
  6. Step 6: Final answer
    x = 217.39

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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.