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Finding the Fourth Proportional to 416.85, 625.31 and 108.71

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Solution

The fourth proportional to 416.85, 625.31 and 108.71 is: 163.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.85 : 625.31 = 108.71 : x
  2. Step 2: Convert to fraction form
    416.85/625.31 = 108.71/x
  3. Step 3: Cross multiply
    416.85x = 625.31 × 108.71
  4. Step 4: Simplify right side
    416.85x = 67,977.45
  5. Step 5: Solve for x
    x = 67,977.45/416.85
  6. Step 6: Final answer
    x = 163.07

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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.