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Finding the Fourth Proportional to 666.57, 999.97 and 204.34

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Solution

The fourth proportional to 666.57, 999.97 and 204.34 is: 306.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.57 : 999.97 = 204.34 : x
  2. Step 2: Convert to fraction form
    666.57/999.97 = 204.34/x
  3. Step 3: Cross multiply
    666.57x = 999.97 × 204.34
  4. Step 4: Simplify right side
    666.57x = 204,333.88
  5. Step 5: Solve for x
    x = 204,333.88/666.57
  6. Step 6: Final answer
    x = 306.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.