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Finding the Fourth Proportional to 717,694.44, 990,413.52 and 395,397

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Solution

The fourth proportional to 717,694.44, 990,413.52 and 395,397 is: 545,645.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,694.44 : 990,413.52 = 395,397 : x
  2. Step 2: Convert to fraction form
    717,694.44/990,413.52 = 395,397/x
  3. Step 3: Cross multiply
    717,694.44x = 990,413.52 × 395,397
  4. Step 4: Simplify right side
    717,694.44x = 391,606,534,567.44
  5. Step 5: Solve for x
    x = 391,606,534,567.44/717,694.44
  6. Step 6: Final answer
    x = 545,645.21

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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.