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Finding the Fourth Proportional to 2,664.07, 3,996.63 and 815.44

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Solution

The fourth proportional to 2,664.07, 3,996.63 and 815.44 is: 1,223.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,664.07 : 3,996.63 = 815.44 : x
  2. Step 2: Convert to fraction form
    2,664.07/3,996.63 = 815.44/x
  3. Step 3: Cross multiply
    2,664.07x = 3,996.63 × 815.44
  4. Step 4: Simplify right side
    2,664.07x = 3,259,011.97
  5. Step 5: Solve for x
    x = 3,259,011.97/2,664.07
  6. Step 6: Final answer
    x = 1,223.32

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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.