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Finding the Third Proportional to 515,128 and 788,004

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Solution

The third proportional to 515,128 and 788,004 is: 1,205,429.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,128 : 788,004 = 788,004 : x
  2. Step 2: Convert to fraction form
    515,128/788,004 = 788,004/x
  3. Step 3: Cross multiply
    515,128x = 788,004 × 788,004
  4. Step 4: Simplify right side
    515,128x = 620,950,304,016
  5. Step 5: Solve for x
    x = 620,950,304,016/515,128
  6. Step 6: Final answer
    x = 1,205,429.14

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.