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Finding the Fourth Proportional to 204.70, 306.60 and 164.20

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Solution

The fourth proportional to 204.70, 306.60 and 164.20 is: 245.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.70 : 306.60 = 164.20 : x
  2. Step 2: Convert to fraction form
    204.70/306.60 = 164.20/x
  3. Step 3: Cross multiply
    204.70x = 306.60 × 164.20
  4. Step 4: Simplify right side
    204.70x = 50,343.72
  5. Step 5: Solve for x
    x = 50,343.72/204.70
  6. Step 6: Final answer
    x = 245.94

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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.