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Finding the Fourth Proportional to 172.27, 257.11 and 150.21

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Solution

The fourth proportional to 172.27, 257.11 and 150.21 is: 224.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.27 : 257.11 = 150.21 : x
  2. Step 2: Convert to fraction form
    172.27/257.11 = 150.21/x
  3. Step 3: Cross multiply
    172.27x = 257.11 × 150.21
  4. Step 4: Simplify right side
    172.27x = 38,620.49
  5. Step 5: Solve for x
    x = 38,620.49/172.27
  6. Step 6: Final answer
    x = 224.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.