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Finding the Fourth Proportional to 416.89, 625.33 and 391.24

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Solution

The fourth proportional to 416.89, 625.33 and 391.24 is: 586.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.89 : 625.33 = 391.24 : x
  2. Step 2: Convert to fraction form
    416.89/625.33 = 391.24/x
  3. Step 3: Cross multiply
    416.89x = 625.33 × 391.24
  4. Step 4: Simplify right side
    416.89x = 244,653.03
  5. Step 5: Solve for x
    x = 244,653.03/416.89
  6. Step 6: Final answer
    x = 586.86

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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.