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Finding the Fourth Proportional to 415.62, 622.80 and 222.84

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Solution

The fourth proportional to 415.62, 622.80 and 222.84 is: 333.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.62 : 622.80 = 222.84 : x
  2. Step 2: Convert to fraction form
    415.62/622.80 = 222.84/x
  3. Step 3: Cross multiply
    415.62x = 622.80 × 222.84
  4. Step 4: Simplify right side
    415.62x = 138,784.75
  5. Step 5: Solve for x
    x = 138,784.75/415.62
  6. Step 6: Final answer
    x = 333.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.