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Finding the Fourth Proportional to 326.88, 490.59 and 230.76

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Solution

The fourth proportional to 326.88, 490.59 and 230.76 is: 346.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.88 : 490.59 = 230.76 : x
  2. Step 2: Convert to fraction form
    326.88/490.59 = 230.76/x
  3. Step 3: Cross multiply
    326.88x = 490.59 × 230.76
  4. Step 4: Simplify right side
    326.88x = 113,208.55
  5. Step 5: Solve for x
    x = 113,208.55/326.88
  6. Step 6: Final answer
    x = 346.33

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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.