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Finding the Fourth Proportional to 172.74, 237.06 and 154.84

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Solution

The fourth proportional to 172.74, 237.06 and 154.84 is: 212.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.74 : 237.06 = 154.84 : x
  2. Step 2: Convert to fraction form
    172.74/237.06 = 154.84/x
  3. Step 3: Cross multiply
    172.74x = 237.06 × 154.84
  4. Step 4: Simplify right side
    172.74x = 36,706.37
  5. Step 5: Solve for x
    x = 36,706.37/172.74
  6. Step 6: Final answer
    x = 212.49

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.