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Finding the Fourth Proportional to 336.94, 505.20 and 163.72

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Solution

The fourth proportional to 336.94, 505.20 and 163.72 is: 245.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.94 : 505.20 = 163.72 : x
  2. Step 2: Convert to fraction form
    336.94/505.20 = 163.72/x
  3. Step 3: Cross multiply
    336.94x = 505.20 × 163.72
  4. Step 4: Simplify right side
    336.94x = 82,711.34
  5. Step 5: Solve for x
    x = 82,711.34/336.94
  6. Step 6: Final answer
    x = 245.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.