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Finding the Third Proportional to 4,218.75 and 9,281.25

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Solution

The third proportional to 4,218.75 and 9,281.25 is: 20,418.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,218.75 : 9,281.25 = 9,281.25 : x
  2. Step 2: Convert to fraction form
    4,218.75/9,281.25 = 9,281.25/x
  3. Step 3: Cross multiply
    4,218.75x = 9,281.25 × 9,281.25
  4. Step 4: Simplify right side
    4,218.75x = 86,141,601.56
  5. Step 5: Solve for x
    x = 86,141,601.56/4,218.75
  6. Step 6: Final answer
    x = 20,418.75

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.