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Finding the Fourth Proportional to 248.20, 342.26 and 206.70

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Solution

The fourth proportional to 248.20, 342.26 and 206.70 is: 285.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.20 : 342.26 = 206.70 : x
  2. Step 2: Convert to fraction form
    248.20/342.26 = 206.70/x
  3. Step 3: Cross multiply
    248.20x = 342.26 × 206.70
  4. Step 4: Simplify right side
    248.20x = 70,745.14
  5. Step 5: Solve for x
    x = 70,745.14/248.20
  6. Step 6: Final answer
    x = 285.03

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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.