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Finding the Fourth Proportional to 328.53, 492.81 and 166.17

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Solution

The fourth proportional to 328.53, 492.81 and 166.17 is: 249.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.53 : 492.81 = 166.17 : x
  2. Step 2: Convert to fraction form
    328.53/492.81 = 166.17/x
  3. Step 3: Cross multiply
    328.53x = 492.81 × 166.17
  4. Step 4: Simplify right side
    328.53x = 81,890.24
  5. Step 5: Solve for x
    x = 81,890.24/328.53
  6. Step 6: Final answer
    x = 249.26

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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.