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Finding the Fourth Proportional to 172.38, 237.26 and 153.96

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Solution

The fourth proportional to 172.38, 237.26 and 153.96 is: 211.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.38 : 237.26 = 153.96 : x
  2. Step 2: Convert to fraction form
    172.38/237.26 = 153.96/x
  3. Step 3: Cross multiply
    172.38x = 237.26 × 153.96
  4. Step 4: Simplify right side
    172.38x = 36,528.55
  5. Step 5: Solve for x
    x = 36,528.55/172.38
  6. Step 6: Final answer
    x = 211.91

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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.