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Finding the Fourth Proportional to 328.76, 453.91 and 211.03

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Solution

The fourth proportional to 328.76, 453.91 and 211.03 is: 291.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.76 : 453.91 = 211.03 : x
  2. Step 2: Convert to fraction form
    328.76/453.91 = 211.03/x
  3. Step 3: Cross multiply
    328.76x = 453.91 × 211.03
  4. Step 4: Simplify right side
    328.76x = 95,789.85
  5. Step 5: Solve for x
    x = 95,789.85/328.76
  6. Step 6: Final answer
    x = 291.37

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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.