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Finding the Fourth Proportional to 6,388.65, 9,565.20 and 3,261.90

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Solution

The fourth proportional to 6,388.65, 9,565.20 and 3,261.90 is: 4,883.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,388.65 : 9,565.20 = 3,261.90 : x
  2. Step 2: Convert to fraction form
    6,388.65/9,565.20 = 3,261.90/x
  3. Step 3: Cross multiply
    6,388.65x = 9,565.20 × 3,261.90
  4. Step 4: Simplify right side
    6,388.65x = 31,200,725.88
  5. Step 5: Solve for x
    x = 31,200,725.88/6,388.65
  6. Step 6: Final answer
    x = 4,883.77

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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.