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Finding the Fourth Proportional to 309.44, 427.02 and 171.44

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Solution

The fourth proportional to 309.44, 427.02 and 171.44 is: 236.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.44 : 427.02 = 171.44 : x
  2. Step 2: Convert to fraction form
    309.44/427.02 = 171.44/x
  3. Step 3: Cross multiply
    309.44x = 427.02 × 171.44
  4. Step 4: Simplify right side
    309.44x = 73,208.31
  5. Step 5: Solve for x
    x = 73,208.31/309.44
  6. Step 6: Final answer
    x = 236.58

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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.