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Finding the Fourth Proportional to 223.07, 308.07 and 220.64

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Solution

The fourth proportional to 223.07, 308.07 and 220.64 is: 304.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.07 : 308.07 = 220.64 : x
  2. Step 2: Convert to fraction form
    223.07/308.07 = 220.64/x
  3. Step 3: Cross multiply
    223.07x = 308.07 × 220.64
  4. Step 4: Simplify right side
    223.07x = 67,971.02
  5. Step 5: Solve for x
    x = 67,971.02/223.07
  6. Step 6: Final answer
    x = 304.71

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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.