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Finding the Fourth Proportional to 612,685.86, 845,498.97 and 344,413.86

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Solution

The fourth proportional to 612,685.86, 845,498.97 and 344,413.86 is: 475,286.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,685.86 : 845,498.97 = 344,413.86 : x
  2. Step 2: Convert to fraction form
    612,685.86/845,498.97 = 344,413.86/x
  3. Step 3: Cross multiply
    612,685.86x = 845,498.97 × 344,413.86
  4. Step 4: Simplify right side
    612,685.86x = 291,201,563,883.72
  5. Step 5: Solve for x
    x = 291,201,563,883.72/612,685.86
  6. Step 6: Final answer
    x = 475,286.90

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1.5x scale

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.