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Finding the Fourth Proportional to 666.81, 999.82 and 227.91

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Solution

The fourth proportional to 666.81, 999.82 and 227.91 is: 341.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.81 : 999.82 = 227.91 : x
  2. Step 2: Convert to fraction form
    666.81/999.82 = 227.91/x
  3. Step 3: Cross multiply
    666.81x = 999.82 × 227.91
  4. Step 4: Simplify right side
    666.81x = 227,863.98
  5. Step 5: Solve for x
    x = 227,863.98/666.81
  6. Step 6: Final answer
    x = 341.72

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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.