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Finding the Fourth Proportional to 416.25, 623.23 and 391.97

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Solution

The fourth proportional to 416.25, 623.23 and 391.97 is: 586.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.25 : 623.23 = 391.97 : x
  2. Step 2: Convert to fraction form
    416.25/623.23 = 391.97/x
  3. Step 3: Cross multiply
    416.25x = 623.23 × 391.97
  4. Step 4: Simplify right side
    416.25x = 244,288.04
  5. Step 5: Solve for x
    x = 244,288.04/416.25
  6. Step 6: Final answer
    x = 586.88

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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.