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Finding the Fourth Proportional to 441.36, 658.80 and 427.68

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Solution

The fourth proportional to 441.36, 658.80 and 427.68 is: 638.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.36 : 658.80 = 427.68 : x
  2. Step 2: Convert to fraction form
    441.36/658.80 = 427.68/x
  3. Step 3: Cross multiply
    441.36x = 658.80 × 427.68
  4. Step 4: Simplify right side
    441.36x = 281,755.58
  5. Step 5: Solve for x
    x = 281,755.58/441.36
  6. Step 6: Final answer
    x = 638.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.