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Finding the Fourth Proportional to 661,185.73, 991,789.51 and 287,208.73

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Solution

The fourth proportional to 661,185.73, 991,789.51 and 287,208.73 is: 430,817.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,185.73 : 991,789.51 = 287,208.73 : x
  2. Step 2: Convert to fraction form
    661,185.73/991,789.51 = 287,208.73/x
  3. Step 3: Cross multiply
    661,185.73x = 991,789.51 × 287,208.73
  4. Step 4: Simplify right side
    661,185.73x = 284,850,605,594.42
  5. Step 5: Solve for x
    x = 284,850,605,594.42/661,185.73
  6. Step 6: Final answer
    x = 430,817.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.