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Finding the Fourth Proportional to 419.88, 629.97 and 176.61

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Solution

The fourth proportional to 419.88, 629.97 and 176.61 is: 264.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.88 : 629.97 = 176.61 : x
  2. Step 2: Convert to fraction form
    419.88/629.97 = 176.61/x
  3. Step 3: Cross multiply
    419.88x = 629.97 × 176.61
  4. Step 4: Simplify right side
    419.88x = 111,255.85
  5. Step 5: Solve for x
    x = 111,255.85/419.88
  6. Step 6: Final answer
    x = 264.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.