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Finding the Fourth Proportional to 257.75, 355.27 and 205.50

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Solution

The fourth proportional to 257.75, 355.27 and 205.50 is: 283.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.75 : 355.27 = 205.50 : x
  2. Step 2: Convert to fraction form
    257.75/355.27 = 205.50/x
  3. Step 3: Cross multiply
    257.75x = 355.27 × 205.50
  4. Step 4: Simplify right side
    257.75x = 73,007.99
  5. Step 5: Solve for x
    x = 73,007.99/257.75
  6. Step 6: Final answer
    x = 283.25

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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.