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Finding the Fourth Proportional to 617.21, 851.27 and 579.41

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Solution

The fourth proportional to 617.21, 851.27 and 579.41 is: 799.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.21 : 851.27 = 579.41 : x
  2. Step 2: Convert to fraction form
    617.21/851.27 = 579.41/x
  3. Step 3: Cross multiply
    617.21x = 851.27 × 579.41
  4. Step 4: Simplify right side
    617.21x = 493,231.54
  5. Step 5: Solve for x
    x = 493,231.54/617.21
  6. Step 6: Final answer
    x = 799.14

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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.