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Finding the Fourth Proportional to 619.37, 853.96 and 494.81

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Solution

The fourth proportional to 619.37, 853.96 and 494.81 is: 682.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.37 : 853.96 = 494.81 : x
  2. Step 2: Convert to fraction form
    619.37/853.96 = 494.81/x
  3. Step 3: Cross multiply
    619.37x = 853.96 × 494.81
  4. Step 4: Simplify right side
    619.37x = 422,544.48
  5. Step 5: Solve for x
    x = 422,544.48/619.37
  6. Step 6: Final answer
    x = 682.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.