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Finding the Fourth Proportional to 223.64, 308.52 and 153.79

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Solution

The fourth proportional to 223.64, 308.52 and 153.79 is: 212.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.64 : 308.52 = 153.79 : x
  2. Step 2: Convert to fraction form
    223.64/308.52 = 153.79/x
  3. Step 3: Cross multiply
    223.64x = 308.52 × 153.79
  4. Step 4: Simplify right side
    223.64x = 47,446.30
  5. Step 5: Solve for x
    x = 47,446.30/223.64
  6. Step 6: Final answer
    x = 212.16

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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.