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Finding the Fourth Proportional to 353.63, 488.03 and 206.30

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Solution

The fourth proportional to 353.63, 488.03 and 206.30 is: 284.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.63 : 488.03 = 206.30 : x
  2. Step 2: Convert to fraction form
    353.63/488.03 = 206.30/x
  3. Step 3: Cross multiply
    353.63x = 488.03 × 206.30
  4. Step 4: Simplify right side
    353.63x = 100,680.59
  5. Step 5: Solve for x
    x = 100,680.59/353.63
  6. Step 6: Final answer
    x = 284.71

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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.