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Finding the Fourth Proportional to 201.25, 277.95 and 143.34

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Solution

The fourth proportional to 201.25, 277.95 and 143.34 is: 197.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.25 : 277.95 = 143.34 : x
  2. Step 2: Convert to fraction form
    201.25/277.95 = 143.34/x
  3. Step 3: Cross multiply
    201.25x = 277.95 × 143.34
  4. Step 4: Simplify right side
    201.25x = 39,841.35
  5. Step 5: Solve for x
    x = 39,841.35/201.25
  6. Step 6: Final answer
    x = 197.97

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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.