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Finding the Fourth Proportional to 416.85, 625.32 and 108.70

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Solution

The fourth proportional to 416.85, 625.32 and 108.70 is: 163.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.85 : 625.32 = 108.70 : x
  2. Step 2: Convert to fraction form
    416.85/625.32 = 108.70/x
  3. Step 3: Cross multiply
    416.85x = 625.32 × 108.70
  4. Step 4: Simplify right side
    416.85x = 67,972.48
  5. Step 5: Solve for x
    x = 67,972.48/416.85
  6. Step 6: Final answer
    x = 163.06

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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.