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Finding the Fourth Proportional to 666.38, 999.70 and 227.58

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Solution

The fourth proportional to 666.38, 999.70 and 227.58 is: 341.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.38 : 999.70 = 227.58 : x
  2. Step 2: Convert to fraction form
    666.38/999.70 = 227.58/x
  3. Step 3: Cross multiply
    666.38x = 999.70 × 227.58
  4. Step 4: Simplify right side
    666.38x = 227,511.73
  5. Step 5: Solve for x
    x = 227,511.73/666.38
  6. Step 6: Final answer
    x = 341.41

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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.