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Finding the Fourth Proportional to 353.70, 488.19 and 222.69

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Solution

The fourth proportional to 353.70, 488.19 and 222.69 is: 307.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.70 : 488.19 = 222.69 : x
  2. Step 2: Convert to fraction form
    353.70/488.19 = 222.69/x
  3. Step 3: Cross multiply
    353.70x = 488.19 × 222.69
  4. Step 4: Simplify right side
    353.70x = 108,715.03
  5. Step 5: Solve for x
    x = 108,715.03/353.70
  6. Step 6: Final answer
    x = 307.37

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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.