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Finding the Fourth Proportional to 312,599.35, 431,228.39 and 197,684.46

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Solution

The fourth proportional to 312,599.35, 431,228.39 and 197,684.46 is: 272,704.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,599.35 : 431,228.39 = 197,684.46 : x
  2. Step 2: Convert to fraction form
    312,599.35/431,228.39 = 197,684.46/x
  3. Step 3: Cross multiply
    312,599.35x = 431,228.39 × 197,684.46
  4. Step 4: Simplify right side
    312,599.35x = 85,247,151,413.82
  5. Step 5: Solve for x
    x = 85,247,151,413.82/312,599.35
  6. Step 6: Final answer
    x = 272,704.19

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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.