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Finding the Fourth Proportional to 5,487.68, 8,231.28 and 1,789.88

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Solution

The fourth proportional to 5,487.68, 8,231.28 and 1,789.88 is: 2,684.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,487.68 : 8,231.28 = 1,789.88 : x
  2. Step 2: Convert to fraction form
    5,487.68/8,231.28 = 1,789.88/x
  3. Step 3: Cross multiply
    5,487.68x = 8,231.28 × 1,789.88
  4. Step 4: Simplify right side
    5,487.68x = 14,733,003.45
  5. Step 5: Solve for x
    x = 14,733,003.45/5,487.68
  6. Step 6: Final answer
    x = 2,684.74

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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.