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Finding the Fourth Proportional to 666.18, 999.68 and 300.97

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Solution

The fourth proportional to 666.18, 999.68 and 300.97 is: 451.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.18 : 999.68 = 300.97 : x
  2. Step 2: Convert to fraction form
    666.18/999.68 = 300.97/x
  3. Step 3: Cross multiply
    666.18x = 999.68 × 300.97
  4. Step 4: Simplify right side
    666.18x = 300,873.69
  5. Step 5: Solve for x
    x = 300,873.69/666.18
  6. Step 6: Final answer
    x = 451.64

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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.