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Finding the Fourth Proportional to 391,808.60, 587,710.38 and 189,168.20

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Solution

The fourth proportional to 391,808.60, 587,710.38 and 189,168.20 is: 283,751.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,808.60 : 587,710.38 = 189,168.20 : x
  2. Step 2: Convert to fraction form
    391,808.60/587,710.38 = 189,168.20/x
  3. Step 3: Cross multiply
    391,808.60x = 587,710.38 × 189,168.20
  4. Step 4: Simplify right side
    391,808.60x = 111,176,114,705.92
  5. Step 5: Solve for x
    x = 111,176,114,705.92/391,808.60
  6. Step 6: Final answer
    x = 283,751.08

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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.