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Finding the Fourth Proportional to 285,909.61, 428,323.11 and 190,853.17

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Solution

The fourth proportional to 285,909.61, 428,323.11 and 190,853.17 is: 285,918.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,909.61 : 428,323.11 = 190,853.17 : x
  2. Step 2: Convert to fraction form
    285,909.61/428,323.11 = 190,853.17/x
  3. Step 3: Cross multiply
    285,909.61x = 428,323.11 × 190,853.17
  4. Step 4: Simplify right side
    285,909.61x = 81,746,823,327.76
  5. Step 5: Solve for x
    x = 81,746,823,327.76/285,909.61
  6. Step 6: Final answer
    x = 285,918.42

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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.