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Finding the Fourth Proportional to 318.33, 477.09 and 236.93

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Solution

The fourth proportional to 318.33, 477.09 and 236.93 is: 355.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.33 : 477.09 = 236.93 : x
  2. Step 2: Convert to fraction form
    318.33/477.09 = 236.93/x
  3. Step 3: Cross multiply
    318.33x = 477.09 × 236.93
  4. Step 4: Simplify right side
    318.33x = 113,034.55
  5. Step 5: Solve for x
    x = 113,034.55/318.33
  6. Step 6: Final answer
    x = 355.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.