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Finding the Fourth Proportional to 223.65, 308.21 and 192.56

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Solution

The fourth proportional to 223.65, 308.21 and 192.56 is: 265.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.65 : 308.21 = 192.56 : x
  2. Step 2: Convert to fraction form
    223.65/308.21 = 192.56/x
  3. Step 3: Cross multiply
    223.65x = 308.21 × 192.56
  4. Step 4: Simplify right side
    223.65x = 59,348.63
  5. Step 5: Solve for x
    x = 59,348.63/223.65
  6. Step 6: Final answer
    x = 265.36

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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.