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Finding the Fourth Proportional to 456.33, 629.87 and 308.94

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Solution

The fourth proportional to 456.33, 629.87 and 308.94 is: 426.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.33 : 629.87 = 308.94 : x
  2. Step 2: Convert to fraction form
    456.33/629.87 = 308.94/x
  3. Step 3: Cross multiply
    456.33x = 629.87 × 308.94
  4. Step 4: Simplify right side
    456.33x = 194,590.49
  5. Step 5: Solve for x
    x = 194,590.49/456.33
  6. Step 6: Final answer
    x = 426.42

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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.