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Finding the Fourth Proportional to 391,789.94, 587,906.34 and 167,129.15

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Solution

The fourth proportional to 391,789.94, 587,906.34 and 167,129.15 is: 250,788.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,789.94 : 587,906.34 = 167,129.15 : x
  2. Step 2: Convert to fraction form
    391,789.94/587,906.34 = 167,129.15/x
  3. Step 3: Cross multiply
    391,789.94x = 587,906.34 × 167,129.15
  4. Step 4: Simplify right side
    391,789.94x = 98,256,286,883.81
  5. Step 5: Solve for x
    x = 98,256,286,883.81/391,789.94
  6. Step 6: Final answer
    x = 250,788.18

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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.