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Finding the Fourth Proportional to 640,413.48, 883,198.46 and 531,345.12

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Solution

The fourth proportional to 640,413.48, 883,198.46 and 531,345.12 is: 732,781.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,413.48 : 883,198.46 = 531,345.12 : x
  2. Step 2: Convert to fraction form
    640,413.48/883,198.46 = 531,345.12/x
  3. Step 3: Cross multiply
    640,413.48x = 883,198.46 × 531,345.12
  4. Step 4: Simplify right side
    640,413.48x = 469,283,191,712.52
  5. Step 5: Solve for x
    x = 469,283,191,712.52/640,413.48
  6. Step 6: Final answer
    x = 732,781.56

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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.