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Finding the Fourth Proportional to 192.19, 287.80 and 110.79

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Solution

The fourth proportional to 192.19, 287.80 and 110.79 is: 165.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.19 : 287.80 = 110.79 : x
  2. Step 2: Convert to fraction form
    192.19/287.80 = 110.79/x
  3. Step 3: Cross multiply
    192.19x = 287.80 × 110.79
  4. Step 4: Simplify right side
    192.19x = 31,885.36
  5. Step 5: Solve for x
    x = 31,885.36/192.19
  6. Step 6: Final answer
    x = 165.91

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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.