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Finding the Fourth Proportional to 328.55, 492.77 and 109.18

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Solution

The fourth proportional to 328.55, 492.77 and 109.18 is: 163.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.55 : 492.77 = 109.18 : x
  2. Step 2: Convert to fraction form
    328.55/492.77 = 109.18/x
  3. Step 3: Cross multiply
    328.55x = 492.77 × 109.18
  4. Step 4: Simplify right side
    328.55x = 53,801.54
  5. Step 5: Solve for x
    x = 53,801.54/328.55
  6. Step 6: Final answer
    x = 163.75

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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.