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Finding the Fourth Proportional to 231.35, 319.25 and 133.09

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Solution

The fourth proportional to 231.35, 319.25 and 133.09 is: 183.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.35 : 319.25 = 133.09 : x
  2. Step 2: Convert to fraction form
    231.35/319.25 = 133.09/x
  3. Step 3: Cross multiply
    231.35x = 319.25 × 133.09
  4. Step 4: Simplify right side
    231.35x = 42,486.72
  5. Step 5: Solve for x
    x = 42,486.72/231.35
  6. Step 6: Final answer
    x = 183.65

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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.