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Finding the Fourth Proportional to 192.51, 289.17 and 168.21

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Solution

The fourth proportional to 192.51, 289.17 and 168.21 is: 252.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.51 : 289.17 = 168.21 : x
  2. Step 2: Convert to fraction form
    192.51/289.17 = 168.21/x
  3. Step 3: Cross multiply
    192.51x = 289.17 × 168.21
  4. Step 4: Simplify right side
    192.51x = 48,641.29
  5. Step 5: Solve for x
    x = 48,641.29/192.51
  6. Step 6: Final answer
    x = 252.67

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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.