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Finding the Fourth Proportional to 298.36, 411.72 and 172.24

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Solution

The fourth proportional to 298.36, 411.72 and 172.24 is: 237.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.36 : 411.72 = 172.24 : x
  2. Step 2: Convert to fraction form
    298.36/411.72 = 172.24/x
  3. Step 3: Cross multiply
    298.36x = 411.72 × 172.24
  4. Step 4: Simplify right side
    298.36x = 70,912.53
  5. Step 5: Solve for x
    x = 70,912.53/298.36
  6. Step 6: Final answer
    x = 237.67

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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.