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Finding the Fourth Proportional to 192.89, 266.46 and 172.16

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Solution

The fourth proportional to 192.89, 266.46 and 172.16 is: 237.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.89 : 266.46 = 172.16 : x
  2. Step 2: Convert to fraction form
    192.89/266.46 = 172.16/x
  3. Step 3: Cross multiply
    192.89x = 266.46 × 172.16
  4. Step 4: Simplify right side
    192.89x = 45,872.89
  5. Step 5: Solve for x
    x = 45,872.89/192.89
  6. Step 6: Final answer
    x = 237.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.