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Finding the Fourth Proportional to 447.56, 617.35 and 279.60

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Solution

The fourth proportional to 447.56, 617.35 and 279.60 is: 385.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.56 : 617.35 = 279.60 : x
  2. Step 2: Convert to fraction form
    447.56/617.35 = 279.60/x
  3. Step 3: Cross multiply
    447.56x = 617.35 × 279.60
  4. Step 4: Simplify right side
    447.56x = 172,611.06
  5. Step 5: Solve for x
    x = 172,611.06/447.56
  6. Step 6: Final answer
    x = 385.68

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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.