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Finding the Fourth Proportional to 287,993.96, 396,979.11 and 197,192.91

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Solution

The fourth proportional to 287,993.96, 396,979.11 and 197,192.91 is: 271,816.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,993.96 : 396,979.11 = 197,192.91 : x
  2. Step 2: Convert to fraction form
    287,993.96/396,979.11 = 197,192.91/x
  3. Step 3: Cross multiply
    287,993.96x = 396,979.11 × 197,192.91
  4. Step 4: Simplify right side
    287,993.96x = 78,281,464,881.18
  5. Step 5: Solve for x
    x = 78,281,464,881.18/287,993.96
  6. Step 6: Final answer
    x = 271,816.35

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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.