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Finding the Fourth Proportional to 3,722.78, 5,584.21 and 1,257.41

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Solution

The fourth proportional to 3,722.78, 5,584.21 and 1,257.41 is: 1,886.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,722.78 : 5,584.21 = 1,257.41 : x
  2. Step 2: Convert to fraction form
    3,722.78/5,584.21 = 1,257.41/x
  3. Step 3: Cross multiply
    3,722.78x = 5,584.21 × 1,257.41
  4. Step 4: Simplify right side
    3,722.78x = 7,021,652.31
  5. Step 5: Solve for x
    x = 7,021,652.31/3,722.78
  6. Step 6: Final answer
    x = 1,886.13

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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.