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Finding the Fourth Proportional to 617.60, 850.22 and 486.38

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Solution

The fourth proportional to 617.60, 850.22 and 486.38 is: 669.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.60 : 850.22 = 486.38 : x
  2. Step 2: Convert to fraction form
    617.60/850.22 = 486.38/x
  3. Step 3: Cross multiply
    617.60x = 850.22 × 486.38
  4. Step 4: Simplify right side
    617.60x = 413,530.00
  5. Step 5: Solve for x
    x = 413,530.00/617.60
  6. Step 6: Final answer
    x = 669.58

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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.