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Finding the Fourth Proportional to 328.56, 492.10 and 235.83

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Solution

The fourth proportional to 328.56, 492.10 and 235.83 is: 353.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.56 : 492.10 = 235.83 : x
  2. Step 2: Convert to fraction form
    328.56/492.10 = 235.83/x
  3. Step 3: Cross multiply
    328.56x = 492.10 × 235.83
  4. Step 4: Simplify right side
    328.56x = 116,048.30
  5. Step 5: Solve for x
    x = 116,048.30/328.56
  6. Step 6: Final answer
    x = 353.21

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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.