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Finding the Fourth Proportional to 666.09, 999.38 and 392.27

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Solution

The fourth proportional to 666.09, 999.38 and 392.27 is: 588.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.09 : 999.38 = 392.27 : x
  2. Step 2: Convert to fraction form
    666.09/999.38 = 392.27/x
  3. Step 3: Cross multiply
    666.09x = 999.38 × 392.27
  4. Step 4: Simplify right side
    666.09x = 392,022.78
  5. Step 5: Solve for x
    x = 392,022.78/666.09
  6. Step 6: Final answer
    x = 588.54

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