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Finding the Fourth Proportional to 415.69, 622.81 and 299.57

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Solution

The fourth proportional to 415.69, 622.81 and 299.57 is: 448.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.69 : 622.81 = 299.57 : x
  2. Step 2: Convert to fraction form
    415.69/622.81 = 299.57/x
  3. Step 3: Cross multiply
    415.69x = 622.81 × 299.57
  4. Step 4: Simplify right side
    415.69x = 186,576.00
  5. Step 5: Solve for x
    x = 186,576.00/415.69
  6. Step 6: Final answer
    x = 448.84

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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.