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Finding the Fourth Proportional to 5,388.40, 8,079 and 4,349.68

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Solution

The fourth proportional to 5,388.40, 8,079 and 4,349.68 is: 6,521.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,388.40 : 8,079 = 4,349.68 : x
  2. Step 2: Convert to fraction form
    5,388.40/8,079 = 4,349.68/x
  3. Step 3: Cross multiply
    5,388.40x = 8,079 × 4,349.68
  4. Step 4: Simplify right side
    5,388.40x = 35,141,064.72
  5. Step 5: Solve for x
    x = 35,141,064.72/5,388.40
  6. Step 6: Final answer
    x = 6,521.61

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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.