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Finding the Fourth Proportional to 391,743.44, 587,688.92 and 279,144.33

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Solution

The fourth proportional to 391,743.44, 587,688.92 and 279,144.33 is: 418,769.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,743.44 : 587,688.92 = 279,144.33 : x
  2. Step 2: Convert to fraction form
    391,743.44/587,688.92 = 279,144.33/x
  3. Step 3: Cross multiply
    391,743.44x = 587,688.92 × 279,144.33
  4. Step 4: Simplify right side
    391,743.44x = 164,050,027,269.06
  5. Step 5: Solve for x
    x = 164,050,027,269.06/391,743.44
  6. Step 6: Final answer
    x = 418,769.05

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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.