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Finding the Third Proportional to 4,379.91 and 6,615.42

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Solution

The third proportional to 4,379.91 and 6,615.42 is: 9,991.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,379.91 : 6,615.42 = 6,615.42 : x
  2. Step 2: Convert to fraction form
    4,379.91/6,615.42 = 6,615.42/x
  3. Step 3: Cross multiply
    4,379.91x = 6,615.42 × 6,615.42
  4. Step 4: Simplify right side
    4,379.91x = 43,763,806.58
  5. Step 5: Solve for x
    x = 43,763,806.58/4,379.91
  6. Step 6: Final answer
    x = 9,991.95

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.