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Finding the Fourth Proportional to 621,703,730.97, 858,026,389.32 and 353,844,692.73

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Solution

The fourth proportional to 621,703,730.97, 858,026,389.32 and 353,844,692.73 is: 488,348,499.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,703,730.97 : 858,026,389.32 = 353,844,692.73 : x
  2. Step 2: Convert to fraction form
    621,703,730.97/858,026,389.32 = 353,844,692.73/x
  3. Step 3: Cross multiply
    621,703,730.97x = 858,026,389.32 × 353,844,692.73
  4. Step 4: Simplify right side
    621,703,730.97x = 303,608,084,083,166,784
  5. Step 5: Solve for x
    x = 303,608,084,083,166,784/621,703,730.97
  6. Step 6: Final answer
    x = 488,348,499.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.