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Finding the Fourth Proportional to 6,388.60, 9,579.65 and 2,922.88

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Solution

The fourth proportional to 6,388.60, 9,579.65 and 2,922.88 is: 4,382.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,388.60 : 9,579.65 = 2,922.88 : x
  2. Step 2: Convert to fraction form
    6,388.60/9,579.65 = 2,922.88/x
  3. Step 3: Cross multiply
    6,388.60x = 9,579.65 × 2,922.88
  4. Step 4: Simplify right side
    6,388.60x = 28,000,126.80
  5. Step 5: Solve for x
    x = 28,000,126.80/6,388.60
  6. Step 6: Final answer
    x = 4,382.83

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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.