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Finding the Fourth Proportional to 416.75, 623.98 and 279.61

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Solution

The fourth proportional to 416.75, 623.98 and 279.61 is: 418.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.75 : 623.98 = 279.61 : x
  2. Step 2: Convert to fraction form
    416.75/623.98 = 279.61/x
  3. Step 3: Cross multiply
    416.75x = 623.98 × 279.61
  4. Step 4: Simplify right side
    416.75x = 174,471.05
  5. Step 5: Solve for x
    x = 174,471.05/416.75
  6. Step 6: Final answer
    x = 418.65

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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.