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Finding the Fourth Proportional to 354.11, 488.78 and 236.26

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Solution

The fourth proportional to 354.11, 488.78 and 236.26 is: 326.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.11 : 488.78 = 236.26 : x
  2. Step 2: Convert to fraction form
    354.11/488.78 = 236.26/x
  3. Step 3: Cross multiply
    354.11x = 488.78 × 236.26
  4. Step 4: Simplify right side
    354.11x = 115,476.73
  5. Step 5: Solve for x
    x = 115,476.73/354.11
  6. Step 6: Final answer
    x = 326.10

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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.