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Finding the Fourth Proportional to 215.63, 297.69 and 163.79

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Solution

The fourth proportional to 215.63, 297.69 and 163.79 is: 226.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.63 : 297.69 = 163.79 : x
  2. Step 2: Convert to fraction form
    215.63/297.69 = 163.79/x
  3. Step 3: Cross multiply
    215.63x = 297.69 × 163.79
  4. Step 4: Simplify right side
    215.63x = 48,758.65
  5. Step 5: Solve for x
    x = 48,758.65/215.63
  6. Step 6: Final answer
    x = 226.12

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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.