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Finding the Fourth Proportional to 665.85, 999 and 300.89

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Solution

The fourth proportional to 665.85, 999 and 300.89 is: 451.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.85 : 999 = 300.89 : x
  2. Step 2: Convert to fraction form
    665.85/999 = 300.89/x
  3. Step 3: Cross multiply
    665.85x = 999 × 300.89
  4. Step 4: Simplify right side
    665.85x = 300,589.11
  5. Step 5: Solve for x
    x = 300,589.11/665.85
  6. Step 6: Final answer
    x = 451.44

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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.