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Finding the Fourth Proportional to 447.79, 617.97 and 261.25

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Solution

The fourth proportional to 447.79, 617.97 and 261.25 is: 360.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.79 : 617.97 = 261.25 : x
  2. Step 2: Convert to fraction form
    447.79/617.97 = 261.25/x
  3. Step 3: Cross multiply
    447.79x = 617.97 × 261.25
  4. Step 4: Simplify right side
    447.79x = 161,444.66
  5. Step 5: Solve for x
    x = 161,444.66/447.79
  6. Step 6: Final answer
    x = 360.54

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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.