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Finding the Fourth Proportional to 192.18, 289.42 and 173.15

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Solution

The fourth proportional to 192.18, 289.42 and 173.15 is: 260.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.18 : 289.42 = 173.15 : x
  2. Step 2: Convert to fraction form
    192.18/289.42 = 173.15/x
  3. Step 3: Cross multiply
    192.18x = 289.42 × 173.15
  4. Step 4: Simplify right side
    192.18x = 50,113.07
  5. Step 5: Solve for x
    x = 50,113.07/192.18
  6. Step 6: Final answer
    x = 260.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.