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Finding the Fourth Proportional to 273.75, 377.60 and 221.29

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Solution

The fourth proportional to 273.75, 377.60 and 221.29 is: 305.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.75 : 377.60 = 221.29 : x
  2. Step 2: Convert to fraction form
    273.75/377.60 = 221.29/x
  3. Step 3: Cross multiply
    273.75x = 377.60 × 221.29
  4. Step 4: Simplify right side
    273.75x = 83,559.45
  5. Step 5: Solve for x
    x = 83,559.45/273.75
  6. Step 6: Final answer
    x = 305.25

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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.