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Finding the Fourth Proportional to 287,568.55, 396,797.91 and 166,686.21

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Solution

The fourth proportional to 287,568.55, 396,797.91 and 166,686.21 is: 229,999.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,568.55 : 396,797.91 = 166,686.21 : x
  2. Step 2: Convert to fraction form
    287,568.55/396,797.91 = 166,686.21/x
  3. Step 3: Cross multiply
    287,568.55x = 396,797.91 × 166,686.21
  4. Step 4: Simplify right side
    287,568.55x = 66,140,739,128.75
  5. Step 5: Solve for x
    x = 66,140,739,128.75/287,568.55
  6. Step 6: Final answer
    x = 229,999.90

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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.