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Finding the Fourth Proportional to 3,874.43, 5,811.87 and 1,409.51

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Solution

The fourth proportional to 3,874.43, 5,811.87 and 1,409.51 is: 2,114.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,874.43 : 5,811.87 = 1,409.51 : x
  2. Step 2: Convert to fraction form
    3,874.43/5,811.87 = 1,409.51/x
  3. Step 3: Cross multiply
    3,874.43x = 5,811.87 × 1,409.51
  4. Step 4: Simplify right side
    3,874.43x = 8,191,888.88
  5. Step 5: Solve for x
    x = 8,191,888.88/3,874.43
  6. Step 6: Final answer
    x = 2,114.35

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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.