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Finding the Fourth Proportional to 2,558.76, 3,835.22 and 1,243.78

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Solution

The fourth proportional to 2,558.76, 3,835.22 and 1,243.78 is: 1,864.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,558.76 : 3,835.22 = 1,243.78 : x
  2. Step 2: Convert to fraction form
    2,558.76/3,835.22 = 1,243.78/x
  3. Step 3: Cross multiply
    2,558.76x = 3,835.22 × 1,243.78
  4. Step 4: Simplify right side
    2,558.76x = 4,770,154.12
  5. Step 5: Solve for x
    x = 4,770,154.12/2,558.76
  6. Step 6: Final answer
    x = 1,864.25

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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.