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Finding the Fourth Proportional to 617.93, 851.77 and 396.50

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Solution

The fourth proportional to 617.93, 851.77 and 396.50 is: 546.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.93 : 851.77 = 396.50 : x
  2. Step 2: Convert to fraction form
    617.93/851.77 = 396.50/x
  3. Step 3: Cross multiply
    617.93x = 851.77 × 396.50
  4. Step 4: Simplify right side
    617.93x = 337,720.81
  5. Step 5: Solve for x
    x = 337,720.81/617.93
  6. Step 6: Final answer
    x = 546.54

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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.