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Finding the Fourth Proportional to 455.92, 629.54 and 357.64

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Solution

The fourth proportional to 455.92, 629.54 and 357.64 is: 493.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.92 : 629.54 = 357.64 : x
  2. Step 2: Convert to fraction form
    455.92/629.54 = 357.64/x
  3. Step 3: Cross multiply
    455.92x = 629.54 × 357.64
  4. Step 4: Simplify right side
    455.92x = 225,148.69
  5. Step 5: Solve for x
    x = 225,148.69/455.92
  6. Step 6: Final answer
    x = 493.83

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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.