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Finding the Third Proportional to 915,717 and 1,989,018

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Solution

The third proportional to 915,717 and 1,989,018 is: 4,320,322.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,717 : 1,989,018 = 1,989,018 : x
  2. Step 2: Convert to fraction form
    915,717/1,989,018 = 1,989,018/x
  3. Step 3: Cross multiply
    915,717x = 1,989,018 × 1,989,018
  4. Step 4: Simplify right side
    915,717x = 3,956,192,604,324
  5. Step 5: Solve for x
    x = 3,956,192,604,324/915,717
  6. Step 6: Final answer
    x = 4,320,322.33

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.