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Finding the Fourth Proportional to 192.90, 289.54 and 131.34

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Solution

The fourth proportional to 192.90, 289.54 and 131.34 is: 197.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.90 : 289.54 = 131.34 : x
  2. Step 2: Convert to fraction form
    192.90/289.54 = 131.34/x
  3. Step 3: Cross multiply
    192.90x = 289.54 × 131.34
  4. Step 4: Simplify right side
    192.90x = 38,028.18
  5. Step 5: Solve for x
    x = 38,028.18/192.90
  6. Step 6: Final answer
    x = 197.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.