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Finding the Fourth Proportional to 287,262.94, 396,128.84 and 190,433.11

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Solution

The fourth proportional to 287,262.94, 396,128.84 and 190,433.11 is: 262,602.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,262.94 : 396,128.84 = 190,433.11 : x
  2. Step 2: Convert to fraction form
    287,262.94/396,128.84 = 190,433.11/x
  3. Step 3: Cross multiply
    287,262.94x = 396,128.84 × 190,433.11
  4. Step 4: Simplify right side
    287,262.94x = 75,436,046,961.89
  5. Step 5: Solve for x
    x = 75,436,046,961.89/287,262.94
  6. Step 6: Final answer
    x = 262,602.78

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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.