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Finding the Fourth Proportional to 215.16, 297.18 and 163.64

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Solution

The fourth proportional to 215.16, 297.18 and 163.64 is: 226.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.16 : 297.18 = 163.64 : x
  2. Step 2: Convert to fraction form
    215.16/297.18 = 163.64/x
  3. Step 3: Cross multiply
    215.16x = 297.18 × 163.64
  4. Step 4: Simplify right side
    215.16x = 48,630.54
  5. Step 5: Solve for x
    x = 48,630.54/215.16
  6. Step 6: Final answer
    x = 226.02

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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.