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Finding the Fourth Proportional to 354.33, 489.14 and 236.49

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Solution

The fourth proportional to 354.33, 489.14 and 236.49 is: 326.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.33 : 489.14 = 236.49 : x
  2. Step 2: Convert to fraction form
    354.33/489.14 = 236.49/x
  3. Step 3: Cross multiply
    354.33x = 489.14 × 236.49
  4. Step 4: Simplify right side
    354.33x = 115,676.72
  5. Step 5: Solve for x
    x = 115,676.72/354.33
  6. Step 6: Final answer
    x = 326.47

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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.