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Finding the Fourth Proportional to 296,768.80, 445,153.20 and 86,413.60

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Solution

The fourth proportional to 296,768.80, 445,153.20 and 86,413.60 is: 129,620.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,768.80 : 445,153.20 = 86,413.60 : x
  2. Step 2: Convert to fraction form
    296,768.80/445,153.20 = 86,413.60/x
  3. Step 3: Cross multiply
    296,768.80x = 445,153.20 × 86,413.60
  4. Step 4: Simplify right side
    296,768.80x = 38,467,290,563.52
  5. Step 5: Solve for x
    x = 38,467,290,563.52/296,768.80
  6. Step 6: Final answer
    x = 129,620.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.