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Finding the Fourth Proportional to 3,563.19, 4,917.19 and 1,991.28

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Solution

The fourth proportional to 3,563.19, 4,917.19 and 1,991.28 is: 2,747.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,563.19 : 4,917.19 = 1,991.28 : x
  2. Step 2: Convert to fraction form
    3,563.19/4,917.19 = 1,991.28/x
  3. Step 3: Cross multiply
    3,563.19x = 4,917.19 × 1,991.28
  4. Step 4: Simplify right side
    3,563.19x = 9,791,492.15
  5. Step 5: Solve for x
    x = 9,791,492.15/3,563.19
  6. Step 6: Final answer
    x = 2,747.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.