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Finding the Fourth Proportional to 192.45, 288.68 and 170.81

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Solution

The fourth proportional to 192.45, 288.68 and 170.81 is: 256.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.45 : 288.68 = 170.81 : x
  2. Step 2: Convert to fraction form
    192.45/288.68 = 170.81/x
  3. Step 3: Cross multiply
    192.45x = 288.68 × 170.81
  4. Step 4: Simplify right side
    192.45x = 49,308.22
  5. Step 5: Solve for x
    x = 49,308.22/192.45
  6. Step 6: Final answer
    x = 256.21

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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.