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Finding the Fourth Proportional to 201.52, 278.60 and 192.90

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Solution

The fourth proportional to 201.52, 278.60 and 192.90 is: 266.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.52 : 278.60 = 192.90 : x
  2. Step 2: Convert to fraction form
    201.52/278.60 = 192.90/x
  3. Step 3: Cross multiply
    201.52x = 278.60 × 192.90
  4. Step 4: Simplify right side
    201.52x = 53,741.94
  5. Step 5: Solve for x
    x = 53,741.94/201.52
  6. Step 6: Final answer
    x = 266.68

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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.