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Finding the Fourth Proportional to 415.26, 622.86 and 141.36

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Solution

The fourth proportional to 415.26, 622.86 and 141.36 is: 212.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.26 : 622.86 = 141.36 : x
  2. Step 2: Convert to fraction form
    415.26/622.86 = 141.36/x
  3. Step 3: Cross multiply
    415.26x = 622.86 × 141.36
  4. Step 4: Simplify right side
    415.26x = 88,047.49
  5. Step 5: Solve for x
    x = 88,047.49/415.26
  6. Step 6: Final answer
    x = 212.03

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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.