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Finding the Fourth Proportional to 215.64, 297.74 and 165.97

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Solution

The fourth proportional to 215.64, 297.74 and 165.97 is: 229.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.64 : 297.74 = 165.97 : x
  2. Step 2: Convert to fraction form
    215.64/297.74 = 165.97/x
  3. Step 3: Cross multiply
    215.64x = 297.74 × 165.97
  4. Step 4: Simplify right side
    215.64x = 49,415.91
  5. Step 5: Solve for x
    x = 49,415.91/215.64
  6. Step 6: Final answer
    x = 229.16

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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.