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Finding the Fourth Proportional to 2,576.43, 3,864.60 and 628.65

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Solution

The fourth proportional to 2,576.43, 3,864.60 and 628.65 is: 942.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,576.43 : 3,864.60 = 628.65 : x
  2. Step 2: Convert to fraction form
    2,576.43/3,864.60 = 628.65/x
  3. Step 3: Cross multiply
    2,576.43x = 3,864.60 × 628.65
  4. Step 4: Simplify right side
    2,576.43x = 2,429,480.79
  5. Step 5: Solve for x
    x = 2,429,480.79/2,576.43
  6. Step 6: Final answer
    x = 942.96

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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.