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Finding the Fourth Proportional to 391,717.10, 587,573.04 and 189,076.68

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Solution

The fourth proportional to 391,717.10, 587,573.04 and 189,076.68 is: 283,613.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,717.10 : 587,573.04 = 189,076.68 : x
  2. Step 2: Convert to fraction form
    391,717.10/587,573.04 = 189,076.68/x
  3. Step 3: Cross multiply
    391,717.10x = 587,573.04 × 189,076.68
  4. Step 4: Simplify right side
    391,717.10x = 111,096,359,660.71
  5. Step 5: Solve for x
    x = 111,096,359,660.71/391,717.10
  6. Step 6: Final answer
    x = 283,613.76

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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.