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Finding the Fourth Proportional to 201.40, 277.77 and 143.08

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Solution

The fourth proportional to 201.40, 277.77 and 143.08 is: 197.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.40 : 277.77 = 143.08 : x
  2. Step 2: Convert to fraction form
    201.40/277.77 = 143.08/x
  3. Step 3: Cross multiply
    201.40x = 277.77 × 143.08
  4. Step 4: Simplify right side
    201.40x = 39,743.33
  5. Step 5: Solve for x
    x = 39,743.33/201.40
  6. Step 6: Final answer
    x = 197.34

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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.