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Finding the Fourth Proportional to 391,799.76, 587,697.21 and 189,159.45

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Solution

The fourth proportional to 391,799.76, 587,697.21 and 189,159.45 is: 283,738.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,799.76 : 587,697.21 = 189,159.45 : x
  2. Step 2: Convert to fraction form
    391,799.76/587,697.21 = 189,159.45/x
  3. Step 3: Cross multiply
    391,799.76x = 587,697.21 × 189,159.45
  4. Step 4: Simplify right side
    391,799.76x = 111,168,481,010.14
  5. Step 5: Solve for x
    x = 111,168,481,010.14/391,799.76
  6. Step 6: Final answer
    x = 283,738.00

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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.