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Finding the Fourth Proportional to 455.62, 629.28 and 331.83

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Solution

The fourth proportional to 455.62, 629.28 and 331.83 is: 458.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.62 : 629.28 = 331.83 : x
  2. Step 2: Convert to fraction form
    455.62/629.28 = 331.83/x
  3. Step 3: Cross multiply
    455.62x = 629.28 × 331.83
  4. Step 4: Simplify right side
    455.62x = 208,812.32
  5. Step 5: Solve for x
    x = 208,812.32/455.62
  6. Step 6: Final answer
    x = 458.31

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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.