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Finding the Fourth Proportional to 3,489.89, 4,816.08 and 1,917.98

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Solution

The fourth proportional to 3,489.89, 4,816.08 and 1,917.98 is: 2,646.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,489.89 : 4,816.08 = 1,917.98 : x
  2. Step 2: Convert to fraction form
    3,489.89/4,816.08 = 1,917.98/x
  3. Step 3: Cross multiply
    3,489.89x = 4,816.08 × 1,917.98
  4. Step 4: Simplify right side
    3,489.89x = 9,237,145.12
  5. Step 5: Solve for x
    x = 9,237,145.12/3,489.89
  6. Step 6: Final answer
    x = 2,646.83

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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.