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Finding the Fourth Proportional to 2,097.12, 3,145.48 and 636.29

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Solution

The fourth proportional to 2,097.12, 3,145.48 and 636.29 is: 954.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,097.12 : 3,145.48 = 636.29 : x
  2. Step 2: Convert to fraction form
    2,097.12/3,145.48 = 636.29/x
  3. Step 3: Cross multiply
    2,097.12x = 3,145.48 × 636.29
  4. Step 4: Simplify right side
    2,097.12x = 2,001,435.53
  5. Step 5: Solve for x
    x = 2,001,435.53/2,097.12
  6. Step 6: Final answer
    x = 954.37

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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.