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Finding the Fourth Proportional to 2,097.76, 3,147.20 and 636.96

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Solution

The fourth proportional to 2,097.76, 3,147.20 and 636.96 is: 955.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,097.76 : 3,147.20 = 636.96 : x
  2. Step 2: Convert to fraction form
    2,097.76/3,147.20 = 636.96/x
  3. Step 3: Cross multiply
    2,097.76x = 3,147.20 × 636.96
  4. Step 4: Simplify right side
    2,097.76x = 2,004,640.51
  5. Step 5: Solve for x
    x = 2,004,640.51/2,097.76
  6. Step 6: Final answer
    x = 955.61

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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.