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Finding the Fourth Proportional to 3,619.50, 4,994.91 and 1,963.50

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Solution

The fourth proportional to 3,619.50, 4,994.91 and 1,963.50 is: 2,709.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.50 : 4,994.91 = 1,963.50 : x
  2. Step 2: Convert to fraction form
    3,619.50/4,994.91 = 1,963.50/x
  3. Step 3: Cross multiply
    3,619.50x = 4,994.91 × 1,963.50
  4. Step 4: Simplify right side
    3,619.50x = 9,807,505.79
  5. Step 5: Solve for x
    x = 9,807,505.79/3,619.50
  6. Step 6: Final answer
    x = 2,709.63

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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.