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Finding the Fourth Proportional to 416.67, 625 and 394.80

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Solution

The fourth proportional to 416.67, 625 and 394.80 is: 592.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.67 : 625 = 394.80 : x
  2. Step 2: Convert to fraction form
    416.67/625 = 394.80/x
  3. Step 3: Cross multiply
    416.67x = 625 × 394.80
  4. Step 4: Simplify right side
    416.67x = 246,750
  5. Step 5: Solve for x
    x = 246,750/416.67
  6. Step 6: Final answer
    x = 592.20

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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.