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Finding the Fourth Proportional to 617.27, 851.87 and 351.66

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Solution

The fourth proportional to 617.27, 851.87 and 351.66 is: 485.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.27 : 851.87 = 351.66 : x
  2. Step 2: Convert to fraction form
    617.27/851.87 = 351.66/x
  3. Step 3: Cross multiply
    617.27x = 851.87 × 351.66
  4. Step 4: Simplify right side
    617.27x = 299,568.60
  5. Step 5: Solve for x
    x = 299,568.60/617.27
  6. Step 6: Final answer
    x = 485.31

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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.