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Finding the Fourth Proportional to 3,663.60, 5,489.10 and 1,711.80

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Solution

The fourth proportional to 3,663.60, 5,489.10 and 1,711.80 is: 2,564.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,663.60 : 5,489.10 = 1,711.80 : x
  2. Step 2: Convert to fraction form
    3,663.60/5,489.10 = 1,711.80/x
  3. Step 3: Cross multiply
    3,663.60x = 5,489.10 × 1,711.80
  4. Step 4: Simplify right side
    3,663.60x = 9,396,241.38
  5. Step 5: Solve for x
    x = 9,396,241.38/3,663.60
  6. Step 6: Final answer
    x = 2,564.76

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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.