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Finding the Fourth Proportional to 416.62, 622.16 and 395.56

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Solution

The fourth proportional to 416.62, 622.16 and 395.56 is: 590.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.62 : 622.16 = 395.56 : x
  2. Step 2: Convert to fraction form
    416.62/622.16 = 395.56/x
  3. Step 3: Cross multiply
    416.62x = 622.16 × 395.56
  4. Step 4: Simplify right side
    416.62x = 246,101.61
  5. Step 5: Solve for x
    x = 246,101.61/416.62
  6. Step 6: Final answer
    x = 590.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.