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Finding the Fourth Proportional to 328.35, 452.99 and 217.89

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Solution

The fourth proportional to 328.35, 452.99 and 217.89 is: 300.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.35 : 452.99 = 217.89 : x
  2. Step 2: Convert to fraction form
    328.35/452.99 = 217.89/x
  3. Step 3: Cross multiply
    328.35x = 452.99 × 217.89
  4. Step 4: Simplify right side
    328.35x = 98,702.54
  5. Step 5: Solve for x
    x = 98,702.54/328.35
  6. Step 6: Final answer
    x = 300.60

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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.