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Finding the Third Proportional to 298,795 and 645,128

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Solution

The third proportional to 298,795 and 645,128 is: 1,392,895.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,795 : 645,128 = 645,128 : x
  2. Step 2: Convert to fraction form
    298,795/645,128 = 645,128/x
  3. Step 3: Cross multiply
    298,795x = 645,128 × 645,128
  4. Step 4: Simplify right side
    298,795x = 416,190,136,384
  5. Step 5: Solve for x
    x = 416,190,136,384/298,795
  6. Step 6: Final answer
    x = 1,392,895.25

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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.