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Finding the Fourth Proportional to 325.59, 489.19 and 204.09

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Solution

The fourth proportional to 325.59, 489.19 and 204.09 is: 306.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.59 : 489.19 = 204.09 : x
  2. Step 2: Convert to fraction form
    325.59/489.19 = 204.09/x
  3. Step 3: Cross multiply
    325.59x = 489.19 × 204.09
  4. Step 4: Simplify right side
    325.59x = 99,838.79
  5. Step 5: Solve for x
    x = 99,838.79/325.59
  6. Step 6: Final answer
    x = 306.64

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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.