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Finding the Fourth Proportional to 353.65, 488.05 and 196.30

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Solution

The fourth proportional to 353.65, 488.05 and 196.30 is: 270.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.65 : 488.05 = 196.30 : x
  2. Step 2: Convert to fraction form
    353.65/488.05 = 196.30/x
  3. Step 3: Cross multiply
    353.65x = 488.05 × 196.30
  4. Step 4: Simplify right side
    353.65x = 95,801.77
  5. Step 5: Solve for x
    x = 95,801.77/353.65
  6. Step 6: Final answer
    x = 270.90

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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.