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Finding the Fourth Proportional to 328.02, 492.04 and 84.55

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Solution

The fourth proportional to 328.02, 492.04 and 84.55 is: 126.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.02 : 492.04 = 84.55 : x
  2. Step 2: Convert to fraction form
    328.02/492.04 = 84.55/x
  3. Step 3: Cross multiply
    328.02x = 492.04 × 84.55
  4. Step 4: Simplify right side
    328.02x = 41,599.52
  5. Step 5: Solve for x
    x = 41,599.52/328.02
  6. Step 6: Final answer
    x = 126.82

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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.