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Finding the Fourth Proportional to 326.66, 489.06 and 248.33

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Solution

The fourth proportional to 326.66, 489.06 and 248.33 is: 371.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.66 : 489.06 = 248.33 : x
  2. Step 2: Convert to fraction form
    326.66/489.06 = 248.33/x
  3. Step 3: Cross multiply
    326.66x = 489.06 × 248.33
  4. Step 4: Simplify right side
    326.66x = 121,448.27
  5. Step 5: Solve for x
    x = 121,448.27/326.66
  6. Step 6: Final answer
    x = 371.79

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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.