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Finding the Fourth Proportional to 353.45, 487.67 and 206.08

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Solution

The fourth proportional to 353.45, 487.67 and 206.08 is: 284.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.45 : 487.67 = 206.08 : x
  2. Step 2: Convert to fraction form
    353.45/487.67 = 206.08/x
  3. Step 3: Cross multiply
    353.45x = 487.67 × 206.08
  4. Step 4: Simplify right side
    353.45x = 100,497.94
  5. Step 5: Solve for x
    x = 100,497.94/353.45
  6. Step 6: Final answer
    x = 284.34

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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.