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Finding the Fourth Proportional to 206.96, 287.46 and 201.20

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Solution

The fourth proportional to 206.96, 287.46 and 201.20 is: 279.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.96 : 287.46 = 201.20 : x
  2. Step 2: Convert to fraction form
    206.96/287.46 = 201.20/x
  3. Step 3: Cross multiply
    206.96x = 287.46 × 201.20
  4. Step 4: Simplify right side
    206.96x = 57,835.51
  5. Step 5: Solve for x
    x = 57,835.51/206.96
  6. Step 6: Final answer
    x = 279.46

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.