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Finding the Fourth Proportional to 488.35, 668.88 and 485.11

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Solution

The fourth proportional to 488.35, 668.88 and 485.11 is: 664.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.35 : 668.88 = 485.11 : x
  2. Step 2: Convert to fraction form
    488.35/668.88 = 485.11/x
  3. Step 3: Cross multiply
    488.35x = 668.88 × 485.11
  4. Step 4: Simplify right side
    488.35x = 324,480.38
  5. Step 5: Solve for x
    x = 324,480.38/488.35
  6. Step 6: Final answer
    x = 664.44

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.