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Finding the Fourth Proportional to 419.61, 629.76 and 224.85

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Solution

The fourth proportional to 419.61, 629.76 and 224.85 is: 337.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.61 : 629.76 = 224.85 : x
  2. Step 2: Convert to fraction form
    419.61/629.76 = 224.85/x
  3. Step 3: Cross multiply
    419.61x = 629.76 × 224.85
  4. Step 4: Simplify right side
    419.61x = 141,601.54
  5. Step 5: Solve for x
    x = 141,601.54/419.61
  6. Step 6: Final answer
    x = 337.46

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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.