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Finding the Fourth Proportional to 666,394.60, 999,643.74 and 193,086.76

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Solution

The fourth proportional to 666,394.60, 999,643.74 and 193,086.76 is: 289,645.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,394.60 : 999,643.74 = 193,086.76 : x
  2. Step 2: Convert to fraction form
    666,394.60/999,643.74 = 193,086.76/x
  3. Step 3: Cross multiply
    666,394.60x = 999,643.74 × 193,086.76
  4. Step 4: Simplify right side
    666,394.60x = 193,017,970,910.88
  5. Step 5: Solve for x
    x = 193,017,970,910.88/666,394.60
  6. Step 6: Final answer
    x = 289,645.16

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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.