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Finding the Fourth Proportional to 666.63, 999.81 and 204.26

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Solution

The fourth proportional to 666.63, 999.81 and 204.26 is: 306.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.63 : 999.81 = 204.26 : x
  2. Step 2: Convert to fraction form
    666.63/999.81 = 204.26/x
  3. Step 3: Cross multiply
    666.63x = 999.81 × 204.26
  4. Step 4: Simplify right side
    666.63x = 204,216.19
  5. Step 5: Solve for x
    x = 204,216.19/666.63
  6. Step 6: Final answer
    x = 306.34

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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.