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Finding the Fourth Proportional to 206.20, 284.20 and 164.60

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Solution

The fourth proportional to 206.20, 284.20 and 164.60 is: 226.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.20 : 284.20 = 164.60 : x
  2. Step 2: Convert to fraction form
    206.20/284.20 = 164.60/x
  3. Step 3: Cross multiply
    206.20x = 284.20 × 164.60
  4. Step 4: Simplify right side
    206.20x = 46,779.32
  5. Step 5: Solve for x
    x = 46,779.32/206.20
  6. Step 6: Final answer
    x = 226.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.