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Finding the Fourth Proportional to 328.42, 491.92 and 236.89

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Solution

The fourth proportional to 328.42, 491.92 and 236.89 is: 354.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.42 : 491.92 = 236.89 : x
  2. Step 2: Convert to fraction form
    328.42/491.92 = 236.89/x
  3. Step 3: Cross multiply
    328.42x = 491.92 × 236.89
  4. Step 4: Simplify right side
    328.42x = 116,530.93
  5. Step 5: Solve for x
    x = 116,530.93/328.42
  6. Step 6: Final answer
    x = 354.82

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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.