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Finding the Fourth Proportional to 223.58, 308.43 and 153.83

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Solution

The fourth proportional to 223.58, 308.43 and 153.83 is: 212.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.58 : 308.43 = 153.83 : x
  2. Step 2: Convert to fraction form
    223.58/308.43 = 153.83/x
  3. Step 3: Cross multiply
    223.58x = 308.43 × 153.83
  4. Step 4: Simplify right side
    223.58x = 47,446.56
  5. Step 5: Solve for x
    x = 47,446.56/223.58
  6. Step 6: Final answer
    x = 212.21

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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.