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Finding the Fourth Proportional to 708,850,702.44, 978,188,333.99 and 391,304,131.47

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Solution

The fourth proportional to 708,850,702.44, 978,188,333.99 and 391,304,131.47 is: 539,985,550.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,850,702.44 : 978,188,333.99 = 391,304,131.47 : x
  2. Step 2: Convert to fraction form
    708,850,702.44/978,188,333.99 = 391,304,131.47/x
  3. Step 3: Cross multiply
    708,850,702.44x = 978,188,333.99 × 391,304,131.47
  4. Step 4: Simplify right side
    708,850,702.44x = 382,769,136,444,086,720
  5. Step 5: Solve for x
    x = 382,769,136,444,086,720/708,850,702.44
  6. Step 6: Final answer
    x = 539,985,550.03

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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.