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Finding the Third Proportional to 656,864 and 1,421,678

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Solution

The third proportional to 656,864 and 1,421,678 is: 3,076,996.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,864 : 1,421,678 = 1,421,678 : x
  2. Step 2: Convert to fraction form
    656,864/1,421,678 = 1,421,678/x
  3. Step 3: Cross multiply
    656,864x = 1,421,678 × 1,421,678
  4. Step 4: Simplify right side
    656,864x = 2,021,168,335,684
  5. Step 5: Solve for x
    x = 2,021,168,335,684/656,864
  6. Step 6: Final answer
    x = 3,076,996.66

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.