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Finding the Fourth Proportional to 192.12, 287.49 and 153.84

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Solution

The fourth proportional to 192.12, 287.49 and 153.84 is: 230.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.12 : 287.49 = 153.84 : x
  2. Step 2: Convert to fraction form
    192.12/287.49 = 153.84/x
  3. Step 3: Cross multiply
    192.12x = 287.49 × 153.84
  4. Step 4: Simplify right side
    192.12x = 44,226.69
  5. Step 5: Solve for x
    x = 44,226.69/192.12
  6. Step 6: Final answer
    x = 230.21

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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.