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Finding the Fourth Proportional to 328.26, 452.91 and 211.89

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Solution

The fourth proportional to 328.26, 452.91 and 211.89 is: 292.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.26 : 452.91 = 211.89 : x
  2. Step 2: Convert to fraction form
    328.26/452.91 = 211.89/x
  3. Step 3: Cross multiply
    328.26x = 452.91 × 211.89
  4. Step 4: Simplify right side
    328.26x = 95,967.10
  5. Step 5: Solve for x
    x = 95,967.10/328.26
  6. Step 6: Final answer
    x = 292.35

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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.