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Finding the Fourth Proportional to 447.69, 617.60 and 290.37

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Solution

The fourth proportional to 447.69, 617.60 and 290.37 is: 400.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.69 : 617.60 = 290.37 : x
  2. Step 2: Convert to fraction form
    447.69/617.60 = 290.37/x
  3. Step 3: Cross multiply
    447.69x = 617.60 × 290.37
  4. Step 4: Simplify right side
    447.69x = 179,327.97
  5. Step 5: Solve for x
    x = 179,327.97/447.69
  6. Step 6: Final answer
    x = 400.57

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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.