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Finding the Fourth Proportional to 415.78, 622.87 and 232.62

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Solution

The fourth proportional to 415.78, 622.87 and 232.62 is: 348.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.78 : 622.87 = 232.62 : x
  2. Step 2: Convert to fraction form
    415.78/622.87 = 232.62/x
  3. Step 3: Cross multiply
    415.78x = 622.87 × 232.62
  4. Step 4: Simplify right side
    415.78x = 144,890.46
  5. Step 5: Solve for x
    x = 144,890.46/415.78
  6. Step 6: Final answer
    x = 348.48

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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.