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Finding the Fourth Proportional to 326.18, 488.28 and 282.44

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Solution

The fourth proportional to 326.18, 488.28 and 282.44 is: 422.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.18 : 488.28 = 282.44 : x
  2. Step 2: Convert to fraction form
    326.18/488.28 = 282.44/x
  3. Step 3: Cross multiply
    326.18x = 488.28 × 282.44
  4. Step 4: Simplify right side
    326.18x = 137,909.80
  5. Step 5: Solve for x
    x = 137,909.80/326.18
  6. Step 6: Final answer
    x = 422.80

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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.