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Finding the Fourth Proportional to 617.72, 852.39 and 352.09

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Solution

The fourth proportional to 617.72, 852.39 and 352.09 is: 485.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.72 : 852.39 = 352.09 : x
  2. Step 2: Convert to fraction form
    617.72/852.39 = 352.09/x
  3. Step 3: Cross multiply
    617.72x = 852.39 × 352.09
  4. Step 4: Simplify right side
    617.72x = 300,118.00
  5. Step 5: Solve for x
    x = 300,118.00/617.72
  6. Step 6: Final answer
    x = 485.85

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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.