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Finding the Fourth Proportional to 617.22, 851.72 and 351.66

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Solution

The fourth proportional to 617.22, 851.72 and 351.66 is: 485.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.22 : 851.72 = 351.66 : x
  2. Step 2: Convert to fraction form
    617.22/851.72 = 351.66/x
  3. Step 3: Cross multiply
    617.22x = 851.72 × 351.66
  4. Step 4: Simplify right side
    617.22x = 299,515.86
  5. Step 5: Solve for x
    x = 299,515.86/617.22
  6. Step 6: Final answer
    x = 485.27

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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.