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Finding the Fourth Proportional to 447.25, 617.27 and 258.25

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Solution

The fourth proportional to 447.25, 617.27 and 258.25 is: 356.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.25 : 617.27 = 258.25 : x
  2. Step 2: Convert to fraction form
    447.25/617.27 = 258.25/x
  3. Step 3: Cross multiply
    447.25x = 617.27 × 258.25
  4. Step 4: Simplify right side
    447.25x = 159,409.98
  5. Step 5: Solve for x
    x = 159,409.98/447.25
  6. Step 6: Final answer
    x = 356.42

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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.