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Finding the Fourth Proportional to 223.38, 308.34 and 215.64

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Solution

The fourth proportional to 223.38, 308.34 and 215.64 is: 297.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.38 : 308.34 = 215.64 : x
  2. Step 2: Convert to fraction form
    223.38/308.34 = 215.64/x
  3. Step 3: Cross multiply
    223.38x = 308.34 × 215.64
  4. Step 4: Simplify right side
    223.38x = 66,490.44
  5. Step 5: Solve for x
    x = 66,490.44/223.38
  6. Step 6: Final answer
    x = 297.66

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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.