Home / 3,381.60-5,072.40-2,805.60

Finding the Fourth Proportional to 3,381.60, 5,072.40 and 2,805.60

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Solution

The fourth proportional to 3,381.60, 5,072.40 and 2,805.60 is: 4,208.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,381.60 : 5,072.40 = 2,805.60 : x
  2. Step 2: Convert to fraction form
    3,381.60/5,072.40 = 2,805.60/x
  3. Step 3: Cross multiply
    3,381.60x = 5,072.40 × 2,805.60
  4. Step 4: Simplify right side
    3,381.60x = 14,231,125.44
  5. Step 5: Solve for x
    x = 14,231,125.44/3,381.60
  6. Step 6: Final answer
    x = 4,208.40

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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.