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Finding the Fourth Proportional to 639,352.80, 958,683.60 and 265,413.60

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Solution

The fourth proportional to 639,352.80, 958,683.60 and 265,413.60 is: 397,976.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,352.80 : 958,683.60 = 265,413.60 : x
  2. Step 2: Convert to fraction form
    639,352.80/958,683.60 = 265,413.60/x
  3. Step 3: Cross multiply
    639,352.80x = 958,683.60 × 265,413.60
  4. Step 4: Simplify right side
    639,352.80x = 254,447,665,536.96
  5. Step 5: Solve for x
    x = 254,447,665,536.96/639,352.80
  6. Step 6: Final answer
    x = 397,976.93

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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.