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Finding the Third Proportional to 3,215,421.75 and 7,078,539.75

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Solution

The third proportional to 3,215,421.75 and 7,078,539.75 is: 15,582,940.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215,421.75 : 7,078,539.75 = 7,078,539.75 : x
  2. Step 2: Convert to fraction form
    3,215,421.75/7,078,539.75 = 7,078,539.75/x
  3. Step 3: Cross multiply
    3,215,421.75x = 7,078,539.75 × 7,078,539.75
  4. Step 4: Simplify right side
    3,215,421.75x = 50,105,724,992,330.06
  5. Step 5: Solve for x
    x = 50,105,724,992,330.06/3,215,421.75
  6. Step 6: Final answer
    x = 15,582,940.24

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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.