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Finding the Fourth Proportional to 414.64, 620.82 and 299.20

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Solution

The fourth proportional to 414.64, 620.82 and 299.20 is: 447.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.64 : 620.82 = 299.20 : x
  2. Step 2: Convert to fraction form
    414.64/620.82 = 299.20/x
  3. Step 3: Cross multiply
    414.64x = 620.82 × 299.20
  4. Step 4: Simplify right side
    414.64x = 185,749.34
  5. Step 5: Solve for x
    x = 185,749.34/414.64
  6. Step 6: Final answer
    x = 447.98

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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.