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Finding the Fourth Proportional to 3,287.64, 4,536.78 and 1,890.42

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Solution

The fourth proportional to 3,287.64, 4,536.78 and 1,890.42 is: 2,608.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,287.64 : 4,536.78 = 1,890.42 : x
  2. Step 2: Convert to fraction form
    3,287.64/4,536.78 = 1,890.42/x
  3. Step 3: Cross multiply
    3,287.64x = 4,536.78 × 1,890.42
  4. Step 4: Simplify right side
    3,287.64x = 8,576,419.65
  5. Step 5: Solve for x
    x = 8,576,419.65/3,287.64
  6. Step 6: Final answer
    x = 2,608.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.