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Finding the Fourth Proportional to 287,608.32, 396,900.81 and 166,821.12

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Solution

The fourth proportional to 287,608.32, 396,900.81 and 166,821.12 is: 230,213.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,608.32 : 396,900.81 = 166,821.12 : x
  2. Step 2: Convert to fraction form
    287,608.32/396,900.81 = 166,821.12/x
  3. Step 3: Cross multiply
    287,608.32x = 396,900.81 × 166,821.12
  4. Step 4: Simplify right side
    287,608.32x = 66,211,437,653.11
  5. Step 5: Solve for x
    x = 66,211,437,653.11/287,608.32
  6. Step 6: Final answer
    x = 230,213.92

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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.