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Finding the Fourth Proportional to 486.88, 667.07 and 480.81

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Solution

The fourth proportional to 486.88, 667.07 and 480.81 is: 658.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.88 : 667.07 = 480.81 : x
  2. Step 2: Convert to fraction form
    486.88/667.07 = 480.81/x
  3. Step 3: Cross multiply
    486.88x = 667.07 × 480.81
  4. Step 4: Simplify right side
    486.88x = 320,731.52
  5. Step 5: Solve for x
    x = 320,731.52/486.88
  6. Step 6: Final answer
    x = 658.75

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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.