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Finding the Fourth Proportional to 2,576.45, 3,864.68 and 628.64

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Solution

The fourth proportional to 2,576.45, 3,864.68 and 628.64 is: 942.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,576.45 : 3,864.68 = 628.64 : x
  2. Step 2: Convert to fraction form
    2,576.45/3,864.68 = 628.64/x
  3. Step 3: Cross multiply
    2,576.45x = 3,864.68 × 628.64
  4. Step 4: Simplify right side
    2,576.45x = 2,429,469.97
  5. Step 5: Solve for x
    x = 2,429,469.97/2,576.45
  6. Step 6: Final answer
    x = 942.95

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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.