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Finding the Fourth Proportional to 419.90, 629.82 and 176.27

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Solution

The fourth proportional to 419.90, 629.82 and 176.27 is: 264.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.90 : 629.82 = 176.27 : x
  2. Step 2: Convert to fraction form
    419.90/629.82 = 176.27/x
  3. Step 3: Cross multiply
    419.90x = 629.82 × 176.27
  4. Step 4: Simplify right side
    419.90x = 111,015.22
  5. Step 5: Solve for x
    x = 111,015.22/419.90
  6. Step 6: Final answer
    x = 264.39

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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.