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Finding the Fourth Proportional to 379.89, 523.98 and 224.64

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Solution

The fourth proportional to 379.89, 523.98 and 224.64 is: 309.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.89 : 523.98 = 224.64 : x
  2. Step 2: Convert to fraction form
    379.89/523.98 = 224.64/x
  3. Step 3: Cross multiply
    379.89x = 523.98 × 224.64
  4. Step 4: Simplify right side
    379.89x = 117,706.87
  5. Step 5: Solve for x
    x = 117,706.87/379.89
  6. Step 6: Final answer
    x = 309.84

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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.