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Finding the Third Proportional to 287,890,686 and 621,654,930

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Solution

The third proportional to 287,890,686 and 621,654,930 is: 1,342,366,637.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,890,686 : 621,654,930 = 621,654,930 : x
  2. Step 2: Convert to fraction form
    287,890,686/621,654,930 = 621,654,930/x
  3. Step 3: Cross multiply
    287,890,686x = 621,654,930 × 621,654,930
  4. Step 4: Simplify right side
    287,890,686x = 386,454,851,993,304,896
  5. Step 5: Solve for x
    x = 386,454,851,993,304,896/287,890,686
  6. Step 6: Final answer
    x = 1,342,366,637.01

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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.