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Finding the Fourth Proportional to 666.06, 999.50 and 281.31

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Solution

The fourth proportional to 666.06, 999.50 and 281.31 is: 422.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.06 : 999.50 = 281.31 : x
  2. Step 2: Convert to fraction form
    666.06/999.50 = 281.31/x
  3. Step 3: Cross multiply
    666.06x = 999.50 × 281.31
  4. Step 4: Simplify right side
    666.06x = 281,171.49
  5. Step 5: Solve for x
    x = 281,171.49/666.06
  6. Step 6: Final answer
    x = 422.14

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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.