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Finding the Fourth Proportional to 192.29, 287.88 and 172.51

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Solution

The fourth proportional to 192.29, 287.88 and 172.51 is: 258.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.29 : 287.88 = 172.51 : x
  2. Step 2: Convert to fraction form
    192.29/287.88 = 172.51/x
  3. Step 3: Cross multiply
    192.29x = 287.88 × 172.51
  4. Step 4: Simplify right side
    192.29x = 49,662.18
  5. Step 5: Solve for x
    x = 49,662.18/192.29
  6. Step 6: Final answer
    x = 258.27

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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.