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Finding the Fourth Proportional to 329.07, 492.91 and 213.11

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Solution

The fourth proportional to 329.07, 492.91 and 213.11 is: 319.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.07 : 492.91 = 213.11 : x
  2. Step 2: Convert to fraction form
    329.07/492.91 = 213.11/x
  3. Step 3: Cross multiply
    329.07x = 492.91 × 213.11
  4. Step 4: Simplify right side
    329.07x = 105,044.05
  5. Step 5: Solve for x
    x = 105,044.05/329.07
  6. Step 6: Final answer
    x = 319.21

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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.