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Finding the Fourth Proportional to 4,479.60, 6,724.80 and 4,447.20

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Solution

The fourth proportional to 4,479.60, 6,724.80 and 4,447.20 is: 6,676.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,479.60 : 6,724.80 = 4,447.20 : x
  2. Step 2: Convert to fraction form
    4,479.60/6,724.80 = 4,447.20/x
  3. Step 3: Cross multiply
    4,479.60x = 6,724.80 × 4,447.20
  4. Step 4: Simplify right side
    4,479.60x = 29,906,530.56
  5. Step 5: Solve for x
    x = 29,906,530.56/4,479.60
  6. Step 6: Final answer
    x = 6,676.16

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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.