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Finding the Fourth Proportional to 3,408.71, 5,111 and 2,223.64

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Solution

The fourth proportional to 3,408.71, 5,111 and 2,223.64 is: 3,334.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,408.71 : 5,111 = 2,223.64 : x
  2. Step 2: Convert to fraction form
    3,408.71/5,111 = 2,223.64/x
  3. Step 3: Cross multiply
    3,408.71x = 5,111 × 2,223.64
  4. Step 4: Simplify right side
    3,408.71x = 11,364,998.49
  5. Step 5: Solve for x
    x = 11,364,998.49/3,408.71
  6. Step 6: Final answer
    x = 3,334.11

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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.