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Finding the Fourth Proportional to 665.03, 997.43 and 299.75

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Solution

The fourth proportional to 665.03, 997.43 and 299.75 is: 449.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.03 : 997.43 = 299.75 : x
  2. Step 2: Convert to fraction form
    665.03/997.43 = 299.75/x
  3. Step 3: Cross multiply
    665.03x = 997.43 × 299.75
  4. Step 4: Simplify right side
    665.03x = 298,980.64
  5. Step 5: Solve for x
    x = 298,980.64/665.03
  6. Step 6: Final answer
    x = 449.57

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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.