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Finding the Fourth Proportional to 291.96, 437.94 and 163.80

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Solution

The fourth proportional to 291.96, 437.94 and 163.80 is: 245.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.96 : 437.94 = 163.80 : x
  2. Step 2: Convert to fraction form
    291.96/437.94 = 163.80/x
  3. Step 3: Cross multiply
    291.96x = 437.94 × 163.80
  4. Step 4: Simplify right side
    291.96x = 71,734.57
  5. Step 5: Solve for x
    x = 71,734.57/291.96
  6. Step 6: Final answer
    x = 245.70

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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.