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Finding the Fourth Proportional to 415.36, 622.92 and 141.45

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Solution

The fourth proportional to 415.36, 622.92 and 141.45 is: 212.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.36 : 622.92 = 141.45 : x
  2. Step 2: Convert to fraction form
    415.36/622.92 = 141.45/x
  3. Step 3: Cross multiply
    415.36x = 622.92 × 141.45
  4. Step 4: Simplify right side
    415.36x = 88,110.23
  5. Step 5: Solve for x
    x = 88,110.23/415.36
  6. Step 6: Final answer
    x = 212.13

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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.