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Finding the Fourth Proportional to 666.72, 999.65 and 204.34

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Solution

The fourth proportional to 666.72, 999.65 and 204.34 is: 306.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.72 : 999.65 = 204.34 : x
  2. Step 2: Convert to fraction form
    666.72/999.65 = 204.34/x
  3. Step 3: Cross multiply
    666.72x = 999.65 × 204.34
  4. Step 4: Simplify right side
    666.72x = 204,268.48
  5. Step 5: Solve for x
    x = 204,268.48/666.72
  6. Step 6: Final answer
    x = 306.38

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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.