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Finding the Fourth Proportional to 415.71, 622.62 and 379.26

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Solution

The fourth proportional to 415.71, 622.62 and 379.26 is: 568.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.71 : 622.62 = 379.26 : x
  2. Step 2: Convert to fraction form
    415.71/622.62 = 379.26/x
  3. Step 3: Cross multiply
    415.71x = 622.62 × 379.26
  4. Step 4: Simplify right side
    415.71x = 236,134.86
  5. Step 5: Solve for x
    x = 236,134.86/415.71
  6. Step 6: Final answer
    x = 568.03

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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.